translation_to_uzbek
Update README.md
typo fix

close #5455
typo fix

close #5454
guide improvement about default values
fix code style php5.4 syntax

close 5458
tranlation_to_uzbek
Merge pull request #5460 from faxriddin/master

[skip ci] translated part of *-upgrade-*.md
messages/ja/yii.php updated
Update test-overview.md

Spelling error
Merge pull request #5463 from softark/ja-message-update

messages/ja/yii.php updated
Update README.md
Fixes #5171: Fixed the bug that ActiveForm + Pjax submit event is only triggered once.
Merge pull request #5465 from alexberriman/patch-1

[skip ci] Update test-overview.md
#5467 Allow pass options to Html:a in Formatter:asUrl
Fixes #5467: Added ability to pass HTML tag options to `asEmail()`, `asImage()` and `asUrl()` methods of `yii\i18n\Formatter`