WAIT - PHPCSDevCS compatibility with PHPCS 4.x (may take a while) | CS: include test generation script in CS scans

As of PHPCS 4.x, files without a file extension can be scanned too if explicitly requested.

Refs:
* squizlabs/PHP_CodeSniffer 2916
* squizlabs/PHP_CodeSniffer@ea01076

Author: jrfnl

phpcs.xml.dist

@@ -10,6 +10,7 @@
     -->
 
     <file>.</file>
+    <file>./bin/phpcs-check-feature-completeness</file>
 
     <!-- Exclude Composer vendor directory. -->
     <exclude-pattern>*/vendor/*</exclude-pattern>