ShortArraySyntaxFixer by sstok
ShortArraySyntaxFixer - update to newest Token/Tokens class
ShortArraySyntaxFixerTest - assertSame instead of assertEquals
ShortArraySyntaxFixer - microchanges
ShortArraySyntaxFixer - simplify detect of T_ARRAY token
ShortArraySyntaxFixerTest - new test case
ShortArraySyntaxFixer - move to Contrib subnamespace
ShortArraySyntaxFixer - set CONTRIB_LEVEL
Fixer::registerBuiltInFixers - method now can register fixer from subnamespace of Symfony\CS\Fixer
Fixer::registerBuiltInConfigs - same change as in Fixer::registerBuiltInFixers
README.rst - update for short_array_syntax fixer