develop
Actually run prettier everywhere
Move es6 files to src, add transpile and qtest grunt tasks
[misc] optimize for loops (#5744)
Replace double with single quotes
Add monthStrictParsing to all locales with dots in the names
[misc] Remove non ES5 code to fix uglify
[bugfix] Fix circular dependency issue (#4906)
New isUndefined utility method
Calculate daysInMonth without Date()
Fix eslint issues
Use existing absFloor function