Ignore also shorhand array notation

Ignore the shorthand array notation as default value for arguments
Fixed a problem where sizeof() would be detected, but \sizeof() would not (Yes, this fix will still ignore \my\ns\sizeof())
Changelog + unit tests + coding standards
Merge branch 'patch-1' of https://github.com/danez/PHP_CodeSniffer
Changelog + unit tests + coding standards
Forgot that short array token are detected by the tokenizer even on unsupported PHP versions
Fixed bug #20296 : new array notion in function comma check fails
Once again, I forgot that short array syntax is tokenized by PHPCS and not PHP
Fixed bug #20310 : PSR2 does not check for space after function name
Fixed bug #20309 : Use "member variable" term in sniff "processMemberVar" method
Fixed bug #20307 : PHP_CodeSniffer_Standards_AbstractVariableSniff analyze traits

Needed to also change a File method that was checking if a member var exists inside a class only.
Fixed bug #20308 : Squiz.ValidVariableNameSniff - wrong variable usage
Slight tweak to wording because it is never going to be 100% accurate
Squiz InlineCommentSniff no longer requires a blank line after post-statement comments (request #20299)
Coding standards fix
Fix un-encoded tab character in error message.

After running phpcs on my large codebase this is the only thing that
broke it when saving the output as json.
Fixing namespaces being incorrectly detected as constants.
Merge branch 'true-namespace' of https://github.com/renan/PHP_CodeSniffer
Made uppercase sniff behave the same as lower + unit test fixes + changelog
Changed single quotes to double as single causes issues for some users