add NoTrailingCommaInSingLineArrayFixer

update README.rst
fix CS
Merge branch 'feat-NoTrailingCommaInSingLineArrayFixer' of https://github.com/sstok/PHP-CS-Fixer into sstok-feat-NoTrailingCommaInSingLineArrayFixer
feature #470 add NoTrailingCommaInSingLineArrayFixer (sstok)