Composer: update version constraints

... of various dependencies.

Refs:
* https://github.com/PHPCSStandards/PHPCSUtils/releases
* https://github.com/PHPCSStandards/PHPCSDevCS/releases/tag/1.1.6
* https://github.com/PHPCSStandards/PHPCSDevTools/releases/tag/1.2.1

Author: jrfnl

composer.json

@@ -22,13 +22,13 @@
     "require" : {
         "php" : ">=5.4",
         "squizlabs/php_codesniffer" : "^3.7.1",
-        "phpcsstandards/phpcsutils" : "^1.0"
+        "phpcsstandards/phpcsutils" : "^1.0.6"
     },
     "require-dev" : {
         "php-parallel-lint/php-parallel-lint": "^1.3.2",
         "php-parallel-lint/php-console-highlighter": "^1.0",
-        "phpcsstandards/phpcsdevcs": "^1.1.5",
-        "phpcsstandards/phpcsdevtools": "^1.2.0",
+        "phpcsstandards/phpcsdevcs": "^1.1.6",
+        "phpcsstandards/phpcsdevtools": "^1.2.1",
         "phpunit/phpunit": "^4.5 || ^5.0 || ^6.0 || ^7.0"
     },
     "extra": {