Add romanian language

[mrbig00]

Q	A
Is bugfix?	❌
New feature?	✔️
Breaks BC?	❌

[vjik]

Are you tested application with this translate? Seems need add language to select...

[mrbig00]

It seems that the language selector is not changing the app language, not even on the master branch

[vjik]

It seems that the language selector is changing the app language, not even on the master branch

Try add new language here: https://github.com/yiisoft/demo/blob/0ae717b7610d20e82039204d117790dcbc8c385b/src/Widget/LanguageSelector.php#L41

[xepozz]

@mrbig00 would you like to complete the pr?

[codecov[bot]]

Codecov Report

Base: 31.58% // Head: 31.58% // No change to project coverage :thumbsup:

Coverage data is based on head (f4fa529) compared to base (1e629a1). Patch has no changes to coverable lines.

Additional details and impacted files

@@            Coverage Diff            @@
##             master     #362   +/-   ##
=========================================
  Coverage     31.58%   31.58%           
  Complexity      340      340           
=========================================
  Files            56       56           
  Lines          1127     1127           
=========================================
  Hits            356      356           
  Misses          771      771           

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