PHPCSStandards / PHPCSUtils / 280

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Pull #79

travis-ci-com

Improve on previous arrow function implementation in various utilities

* Change checking of the return value of the `FunctionDeclarations::getArrowFunctionOpenClose()` function.
    - This function now either returns `false` or a array with all indexes set to the relevant stack pointers.
* Improved the message of the `RuntimeException` for the `FunctionDeclarations::getParameters()` and the `FunctionDeclarations::getProperties()` methods.
* Update unit tests to reflect the change in tokenization of "fn" tokens.
* Remove test skipping for select arrow function related tests on select PHP/PHPCS versions.
    This is no longer needed.
* Add/improve documentation about arrow function support.

Includes a few additional unit tests to safeguard cross-version compatibility with PHPCS 3.5.3 and 3.5.4.

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