chore(release): 0.6.0 [skip ci]

# [0.6.0](v0.5.0...v0.6.0) (2021-12-03)

### Bug Fixes

* **babe:** Fix extrinsic format in block. ([#1530](#1530)) ([1a03b2a](1a03b2a))
* **ci:** add missing go-version matrix to fix development branch CI ([#2037](#2037)) ([6babe76](6babe76))
* **cmd/cfg:** Use  Babe Lead value from toml config ([#2032](#2032)) ([06aa3e3](06aa3e3))
* cmd/gossamer: Generate random name if --name flag not set ([#1506](#1506)) ([3c05a88](3c05a88))
* confirm block import notifier is closed properly ([#1736](#1736)) ([ad2d85e](ad2d85e))
* **docs:** improve build-spec usage docs ([#1706](#1706)) ([2e164b4](2e164b4))
* **dot/core:** Add only extrinsic during chain reorg. ([#1609](#1609)) ([29413d4](29413d4))
* **dot/core:** Batch process transaction message. ([#1780](#1780)) ([0064836](0064836))
* **dot/core:** check transaction Validity.Propagate field to determine whether to propagate tx ([#1643](#1643)) ([81f23cc](81f23cc))
* **dot/core:** Fix handle transaction message test. ([#1607](#1607)) ([58b8725](58b8725))
* **dot/network, lib/grandpa:** fix handshake decoding and grandpa message handler sigabort ([#1631](#1631)) ([887f72c](887f72c))
* **dot/network, lib/grandpa:** fix node sync, improve devnet finality ([bcc7935](bcc7935))
* **dot/network:** add nil checks in connManager ([#2069](#2069)) ([7f9c042](7f9c042))
* **dot/network:** Check for size when decoding leb128. ([#1634](#1634)) ([d082b9e](d082b9e))
* **dot/network:** check if peer supports protocol ([#1617](#1617)) ([6bf66a4](6bf66a4))
* **dot/network:** decrease DHT find peers interval for gssmr nodes ([#1703](#1703)) ([08516a0](08516a0))
* **dot/network:** fix bugs in notifications protocol handlers; add metrics for inbound/outbound streams ([#2010](#2010)) ([8c2993d](8c2993d))
* **dot/network:** fix dht connection on discovery on devnet ([#2059](#2059)) ([da065b8](da065b8))
* **dot/network:** fix discovery between gossamer nodes ([#1594](#1594)) ([f4c79d3](f4c79d3))
* **dot/network:** fix justification request at head logic ([#1510](#1510)) ([98d1413](98d1413))
* **dot/network:** fix memory allocations with `sizedBufferPool` ([#1963](#1963)) ([e0b126b](e0b126b))
* **dot/network:** Fix missing digest in header ([#2092](#2092)) ([21ea85e](21ea85e))
* **dot/network:** Fix notification handshake and reuse stream. ([#1545](#1545)) ([a632dc4](a632dc4))
* **dot/network:** fix receiving notifications messages from substrate peers ([#1517](#1517)) ([fdf3c53](fdf3c53))
* **dot/network:** fix stream manager tests ([#1683](#1683)) ([e02eca4](e02eca4))
* **dot/network:** implement a handshake timeout ([#1615](#1615)) ([87c2f63](87c2f63))
* **dot/network:** Implement time based handle transaction ([#1942](#1942)) ([dd08424](dd08424))
* **dot/network:** move low reputation peer removal from network ConnManager to peer scoring logic (dot/peerstate) ([#2068](#2068)) ([ac16285](ac16285)), closes [#2039](#2039)
* **dot/network:** Return on EOF error while reading stream. ([#1733](#1733)) ([f447eac](f447eac))
* **dot/network:** split stored streams and handshakeData into inbound and outbound ([#1553](#1553)) ([637050b](637050b))
* **dot/network:** update notificationsProtocol handshakeData to sync.Map ([#1492](#1492)) ([22f7269](22f7269))
* **dot/node:** Start websocket server only with `--ws` flag ([#1671](#1671)) ([6ecef3b](6ecef3b))
* **dot/state, lib/babe, lib/trie:** improve syncing between gossamer authority nodes ([#1613](#1613)) ([ca99fbf](ca99fbf))
* **dot/state, lib/grandpa:** update justification and SignedVote handling in database ([#1682](#1682)) ([bbdcd6f](bbdcd6f))
* **dot/state,dot/network:** improve memory usage when syncing ([#1491](#1491)) ([3b2ad8d](3b2ad8d))
* **dot/state:** add StorageState Lock/Unlock API for usage by babe and sync  ([#1700](#1700)) ([3c22ace](3c22ace))
* **dot/state:** fix deadlock, fixes bootstrap syncing ([#1959](#1959)) ([dd80c09](dd80c09))
* **dot/state:** fix usage of trie.Snapshot ([#1489](#1489)) ([3880a40](3880a40))
* **dot/state:** track runtime per-block, fix runtime upgrades differing between forks ([#1638](#1638)) ([e133884](e133884))
* **dot/state:** update `*state.BlockState.AddBlockToBlockTree` to store block in `unfinalisedBlocksMap` ([#2006](#2006)) ([55d997f](55d997f))
* **dot/sync:** add nil header checks ([#2099](#2099)) ([a7d4be0](a7d4be0))
* **dot/sync:** fix block request and response logic ([#1907](#1907)) ([9c6283e](9c6283e))
* **dot/sync:** fix creating block response, fixes node sync between gossamer nodes ([#1572](#1572)) ([1328c80](1328c80))
* **dot/telemetry:** refactor telemetry to reduce CPU usage ([#1597](#1597)) ([bc31ac7](bc31ac7))
* **dot/types:** *types.Body to be of type []types.Extrinsic ([#1807](#1807)) ([4c09715](4c09715))
* **dot/types:** fix max value for digest ([#1687](#1687)) ([48405e7](48405e7))
* **dot:** fix `TestNewNode` ([#2070](#2070)) ([42908d0](42908d0))
* fix edit link ([#1507](#1507)) ([5089327](5089327))
* fix Kusama sync; add storageState lock in core.HandleTransactionMessage ([#1783](#1783)) ([1d688e4](1d688e4))
* **lib/babe, lib/runtime/wasmer:** fixes for v0.9.8+ runtime ([#2075](#2075)) ([2f9f80c](2f9f80c))
* **lib/babe:** add `--babe-lead` flag, update epoch handling logic ([#1895](#1895)) ([7abcce6](7abcce6))
* **lib/babe:** add pre-runtime digest before calling initialize_block ([#1581](#1581)) ([c1b26d3](c1b26d3))
* **lib/babe:** always use 2/3 of slot to produce block, re-add potentially valid txs to queue ([#1679](#1679)) ([cf93ad3](cf93ad3))
* **lib/babe:** call AddBlock in BABE synchronously ([#1585](#1585)) ([86acc43](86acc43))
* **lib/babe:** fix BABE state storing after building block ([#1536](#1536)) ([1a3dea2](1a3dea2))
* **lib/babe:** fix err log ([#1801](#1801)) ([a96f06a](a96f06a))
* **lib/babe:** fix setting first slot of network, fix loading BABE epoch params ([#1640](#1640)) ([5c3dbfe](5c3dbfe))
* **lib/babe:** fix timing for transition between epochs ([#1636](#1636)) ([57027db](57027db))
* **lib/blocktree:** fix blocktree bug  ([#2060](#2060)) ([c17b53a](c17b53a))
* **lib/blocktree:** fix potential nil pointer dereference in `HighestCommonAncestor`, core `handleBlocksAsync` ([#1993](#1993)) ([f7f4463](f7f4463))
* **lib/blocktree:** fix setting leaves after blocktree pruning ([#1605](#1605)) ([58c0854](58c0854))
* **lib/blocktree:** removes the inconsistency to choose a deepest leaf ([#2094](#2094)) ([43d68e3](43d68e3))
* **lib/crypto/ed25519:** update ed25519 to use go-schnorrkel bip39 derivation ([#1488](#1488)) ([dfb95d2](dfb95d2))
* **lib/genesis:** Update missing and incorrect fields in genesis file. ([#1681](#1681)) ([8207704](8207704))
* **lib/grandpa:** fix grandpa stall and various bugs ([#1708](#1708)) ([67c93f4](67c93f4))
* **lib/grandpa:** fix grandpa vote message switch ([#2095](#2095)) ([461890c](461890c))
* **lib/grandpa:** fix threshold checking to be strictly greater than 2/3 ([#1891](#1891)) ([66ffe51](66ffe51))
* **lib/grandpa:** use `defaultGrandpaInterval` if not set, fixes error on startup ([#1982](#1982)) ([75627b5](75627b5))
* **lib/runtime/life:** remove import C from life ([#1923](#1923)) ([ed507d2](ed507d2))
* **lib/runtime:** update HOST_API_TEST_RUNTIME_URL to reference specific commit ([#1885](#1885)) ([666ed06](666ed06))
* **log-levels:** do not ignore configuration file log levels ([#2016](#2016)) ([80879b2](80879b2))
* pending bubble hidden after block included ([#1592](#1592)) ([5826322](5826322))
* persist node name ([#1543](#1543)) ([88b88f2](88b88f2))
* **pprof:** only run pprof service if enabled  ([#2073](#2073)) ([55669c5](55669c5))
* **release:** Trigger release when pushed to main branch. ([#1566](#1566)) ([d445c97](d445c97))
* **rpc/subscription:** subscribe runtime version notify when version changes ([#1686](#1686)) ([9a76d39](9a76d39))
* Staging CI workflow ([#2034](#2034)) ([84ec792](84ec792))
* **trie:** memory leak fix in `lib/trie` ([#2009](#2009)) ([0ad5eb7](0ad5eb7))
* update deprecated package ([#1603](#1603)) ([f195204](f195204))
* update go-schnorrkel version ([#1557](#1557)) ([b86c7ff](b86c7ff))
* update gssmr genesis to use pallet_babe::SameAuthoritiesForever ([#1696](#1696)) ([fb0a751](fb0a751))
* update HOST_API_TEST_RUNTIME_URL ([#1898](#1898)) ([2ef59a8](2ef59a8))
* **utils:** create a specific folder for database ([#1598](#1598)) ([8c67795](8c67795))

### Features

* add --chain dev option ([#1561](#1561)) ([04a2969](04a2969))
* Add properties and chainId on build-spec command ([#1520](#1520)) ([b18290c](b18290c))
* cmd: implement import-runtime subcommand ([#1483](#1483)) ([d82b2da](d82b2da))
* **cmd/gossamer:** implement --telemetry-url parameter ([#1890](#1890)) ([b202e89](b202e89)), closes [#1502](#1502)
* **cmd:** implement offline pruning of state trie ([#1564](#1564)) ([af9c925](af9c925))
* **devnet:** Local Gossamer Devnet ([#2008](#2008)) ([a520001](a520001))
* **dot/network, lib/grandpa:** request justification on receiving NeighbourMessage, verify justification on receipt ([#1529](#1529)) ([e1f9f42](e1f9f42))
* **dot/network:** Add cache for network message. ([#1511](#1511)) ([accaf69](accaf69))
* **dot/network:** add propagate return bool to messageHandler func type to determine whether to propagate message or not ([#1555](#1555)) ([0d6f488](0d6f488))
* **dot/network:** implement persistent peers functionality ([#1512](#1512)) ([7850532](7850532))
* **dot/network:** implement streamManager to cleanup not recently used streams ([#1611](#1611)) ([ba861bf](ba861bf))
* **dot/network:** request block justifications when near head ([#1499](#1499)) ([ae7012b](ae7012b))
* **dot/peerset:** Implement peer scoring ([#1791](#1791)) ([1c989ad](1c989ad))
* **dot/rpc/modules:** add `system_addReservedPeer` and `system_removeReservedPeer` RPC call ([#1712](#1712)) ([dba5922](dba5922))
* **dot/rpc:** Add `system_localListenAddresses` RPC call ([#1689](#1689)) ([c981d2e](c981d2e))
* **dot/rpc:** Implement `childstate_getKeys` rpc call ([#1800](#1800)) ([9b2f41e](9b2f41e))
* **dot/rpc:** implement sync_state_genSyncSpec RPC call  ([#1827](#1827)) ([2186caf](2186caf))
* **dot/state:** implement online pruning of historical state tries ([#1596](#1596)) ([3eb9399](3eb9399))
* **dot/sync:** implement codeSubstitutes ([#1635](#1635)) ([d87aaeb](d87aaeb))
* dot/telemetry: Implement basic telemetry connection ([#1497](#1497)) ([fcb4159](fcb4159))
* **dot/telemetry:** Added connection retry ([#1904](#1904)) ([579a791](579a791))
* **dot/telemetry:** Added more telemetry messages in grandpa client ([#2043](#2043)) ([2e57d15](2e57d15)), closes [#1841](#1841) [#1842](#1842)
* **dot/telemetry:** implement notify.finalized telemetry interface ([#1877](#1877)) ([de1a60d](de1a60d))
* **dot/telemetry:** implement substrate_number_leaves metrics ([#1926](#1926)) ([69823c0](69823c0))
* **dot/telemetry:** implement telemetry message network_state ([#1618](#1618)) ([a81844e](a81844e))
* **flags:** read log levels from flags ([#1953](#1953)) ([9694e46](9694e46))
* implement ext_default_child_storage_storage_kill_version_2 ([#1799](#1799)) ([c2908ae](c2908ae))
* implement ext_offchain_index_set_version_1 for wasmer runtime ([#1739](#1739)) ([96c30a6](96c30a6))
* **lib/babe:** add check of types.ConfigData.SecondarySlots for disabling secondary verification ([#1910](#1910)) ([cd27ae4](cd27ae4))
* **lib/grandpa:** fully verify justifications using GrandpaState ([#1544](#1544)) ([028d25e](028d25e))
* **lib/grandpa:** Include equivocatory nodes while creating justification ([#1911](#1911)) ([aca86b6](aca86b6))
* **lib/grandpa:** send NeighbourMessage to peers ([#1558](#1558)) ([322ccf9](322ccf9))
* **lib/runtime/wasmer:** implement ext_default_child_storage_storage_kill_version_3 ([#1878](#1878)) ([a719a60](a719a60))
* **lib/runtime/wasmer:** implement ext_offchain_local_storage_version_1 ([#1821](#1821)) ([0f63b17](0f63b17))
* **lib/runtime:** Implement `ext_offchain_http_request_add_header_version_1` host function ([#1994](#1994)) ([0a30b3d](0a30b3d))
* **lib/runtime:** Implement `ext_offchain_http_request_start_version_1` host function ([#1947](#1947)) ([974b1fc](974b1fc))
* **lib/runtime:** Implement `trie_blake2_256_verify_proof` host function ([#1920](#1920)) ([506565d](506565d))
* **lib/trie:** Implement `verify_proof` function ([#1883](#1883)) ([67bb5ef](67bb5ef))
* **lib/trie:** Implement limit for trie.ClearPrefix ([#1905](#1905)) ([becec9e](becec9e))
* **lib/trie:** Parallel hash trie. ([#1657](#1657)) ([22827e7](22827e7))
* **pprof:** Pprof HTTP server service ([#1991](#1991)) ([ce24ea9](ce24ea9))
* **rpc/subscription:** implement state_unsubscribeStorage ([#1574](#1574)) ([7574f10](7574f10))
* **rpc:** Implement `childstate_getChildStorage` RPC call ([#1832](#1832)) ([3d949f2](3d949f2))
* **rpc:** Implement `childstate_getStorageHash` RPC call ([#1805](#1805)) ([e539bd3](e539bd3))
* **rpc:** Implement `childstate_getStorageSize` RPC call ([#1810](#1810)) ([a04deb6](a04deb6))
* **rpc:** Implement `payment_queryInfo` RPC call ([#1826](#1826)) ([7a5deec](7a5deec))
* **rpc:** Implement `state_getReadProof` rpc call ([#1768](#1768)) ([865f80f](865f80f))
* **runtime:** implement custom logging handler that print function name ([#1825](#1825)) ([2b1276d](2b1276d))
* **telemetry:** send telemetry messages when GRANDPA receieves commit or vote messages ([#2015](#2015)) ([7bf40e1](7bf40e1)), closes [#1840](#1840) [#1839](#1839) [#1838](#1838)
* **telemetry:** send txpool.import telemetry msg ([#1966](#1966)) ([ffc81bf](ffc81bf))

### Reverts

* Revert "feat(dot/rpc) implement `author_hasSessionKeys` RPC call (#1704)" (#1714) ([65380fd](65380fd)), closes [#1704](#1704) [#1714](#1714)