Method to unlink all relationship many to many in current model
add change to CHANGELOG,and mini refactoring
add #3520 to changelog
change nik name (case sensitive)
Add support all type relation
Added `yii\i18n\Formatter::intlCurrencySymbol`
Renamed Formatter::intlCurrencySymbol to currencySymbol
Fixes typo
 Added comment about $currency when it is null
changelog
Renamed `Formatter::currencySymbol` to `currencyCode`
Changelog
Fixes typo
Adjusted changelog
Adjusted documentation
Change unit test to Unlink and add test to unlinkAll
Merge branch 'patch-1' of github.com:leandrogehlen/yii2 into leandrogehlen-patch-1

Conflicts:
	framework/CHANGELOG.md
Merge branch 'leandrogehlen-patch-1'
minor doc update [skip ci]
Merge branch 'unlinkAll' of github.com:NmDimas/yii2 into NmDimas-unlinkAll

Conflicts:
	framework/CHANGELOG.md