v1.2.3

Fix

• Avoid swallowing thrown errors in callback argument (204de69) - Closes #43
• Callback with an error even if Promise is rejected with nothing (77d00f9) - Closes #42

Docs

• Update project description (cca775b) - Closes #37 #39
• Review and improve a little (cd26d63)

Scaffold

• Add .gitattributes file (c9e7785) - Closes #38 #40