Add $key to function parameter

I think it's better to enclose `$key` as function parameter.
Update CHANGELOG.md
Log for pull request #3544
Merge pull request #2 from yiisoft/master

merge
[WIP] Additional RangeValidator fixes
added example to ActionColumn
fixes Yii source path

fixes #3551
Additional RangeValidator fixes
RangeValidator client side type conversion to array
Merge pull request #3558 from creocoder/range-validator-js-enh

[WIP] Additional RangeValidator fixes
Fixes #3567: Fixed the bug that smallint was treated as string for PostgreSQL
Update intro-upgrade-from-v1.md

fixes #3555
Fixes #3564: Fixed the bug that primary key columns should not take default values from schema
Merge branch 'master' of git://github.com/yiisoft/yii2
Tabs to spaces to be consistent

```
vendor/bin/indent --spaces -r framework/
vendor/bin/indent --tabs -r . --pattern=*.json
vendor/bin/indent --spaces -r . --pattern=*.md
vendor/bin/indent --spaces -r . --pattern=yii.*.js
vendor/bin/indent --spaces -r . --pattern=*.css
```
#3521: Added `yii\filters\HttpCache::sessionCacheLimiter`
RangeValidator typo fix
improved docs about application and module namespace

fixes #3539
fixed wrong usage of @see
another @see