Add checkIfPunctuator method to token helper
Simplify definitions of token helper functions
Add findOperatorByRangeStart fn to token helper
Improve requireSpaceBeforeBinaryOperator rule

Add check for commas to requireSpaceBeforeBinaryOperator rule
Add "backward" argument to checkIfPunctuator fn
Improve disallowSpaceAfterBinaryOperators rule

Add check for commas to disallowSpaceAfterBinaryOperators rule
Improve requireSpaceAfterBinaryOperators rule

Add check for commas to requireSpaceAfterBinaryOperators rule
Improve disallowSpaceBeforeBinaryOperators rule

Add check for commas to disallowSpaceBeforeBinaryOperators rule
Update readme for binary rules
Review fixes

* Rename checkIfPunctuator to getTokenByRangeStartIfPunctuator

* Fix code style issues

* Return null instead of a boolean value in recent added tokenHelper methods
Fix code style issues

Remove spaces inside array brackets
Update google preset

Add "disallowSpacesInsideArrayBrackets" to google preset