Update changelog and version for 3.4.1

Update changelog and compiled assets for 3.4.0

Update changelog for 3.3.1

Update changelog, version and compiled assets for 3.3.0

Update changelog and version for 3.2.1

Update changelog and version for 3.2.0

Update 3.1.0 changelog

Update readme badges

Merge branch 'pr/2228' into 3.x

Update upgrade guide