Release Candidate 4.2.0 (#98)

* feature/validate-instance (#94)

* validate instance

added validate() public method which higlights the ui and returns a boolean whether the instance was valid

* validate instance

ammend to last commit. somehow line was missing

* validate-instance fix for callback functions

calling instance.validate() now works in callbacks. precised the condition when to remove the validation error. Updated callback demo

* Pull request feedback integrated

* Reverted 15-callbacks demo as the programmatic invalidate feature will get its own demo file.

* add programmatic validation demo

* update demos list

* prevent native ui on iOS if disabled

* onoptionclick callback

* changelog

* generate bundle

Co-authored-by: Alex Milde <[email protected]>

openOnFocus fixes

minor release (#86)

Merge pull request #83 from patrickkunka/develop

fix/firefox-scroll-jump-on-focus

Merge pull request #81 from patrickkunka/develop

fix/firefox-styling

bump version

native class name fix

bump version

improve callback api interface

Merge branch 'master' into gh-pages