Fixes #1998 : get input value from hidden field when necessary(unchecked checkbox/radio)
changelog
Merge pull request #2004 from klevron/1998

Fixes #1998 : get input value from hidden field when necessary
Fixes #2003: Added `filter` property to `ExistValidator` and `UniqueValidator` to support adding additional filtering conditions
doc fix.
Added `TableSchema::fullName` property
message fix.
fix #1992: when set yii\captcha\CaptchaValidator::$captchaAction = '/site/captcha'
yii\captcha\CaptchaValidator->createCaptchaAction() error
BaseHtml::listBox() default size settings removed
BaseHtml::listBox() allow to remove size attribute
Merge pull request #2010 from creocoder/basehtml-listbox-size

BaseHtml::listBox() default size settings removed
fixed #1992 the issue that use 'site/captcha' will get wrong refreshUrl in module scenario
BaseHtml::activeDropDownList() fix for 'multiple' mode
BaseHtml::activeListBox() incorrect 'unselect' value fixed.
Merge pull request #2011 from creocoder/activedropdownlist-fix

Html::activeDropDownList() and 'multiple' option fix
BaseHtml::listBox() incorrect array_key_exists() usage fix
Merge pull request #2012 from creocoder/listbox-fix2

BaseHtml::listBox() incorrect array_key_exists() usage fix
CHANGELOG.md typo
Merge pull request #2009 from callmez/master

fix #1992: when set yii\captcha\CaptchaValidator::$captchaAction = '/sit...
Fix typo version

https://github.com/yiisoft/yii2/blob/master/extensions/redis/Cache.php#L16