MC-19366: Downgrade of package webonyx/graphql-php to match lowest php version supported by coding standard

Author: jean-bernard-valentaten

PHP_CodeSniffer/Tokenizers/GraphQL.php

@@ -22,7 +22,6 @@ class GraphQL extends Tokenizer
      * @var array
      */
     private $tokenTypeMap = [
-        Token::AMP          => null, //TODO Should we map this to a specific type
         Token::AT           => 'T_DOC_COMMENT_TAG',
         Token::BANG         => null, //TODO Should we map this to a specific type
         Token::BLOCK_STRING => 'T_COMMENT',

composer.json

@@ -10,7 +10,7 @@
     "require": {
         "php": ">=5.6.0",
         "squizlabs/php_codesniffer": "^3.4",
-        "webonyx/graphql-php": "^0.13.8"
+        "webonyx/graphql-php": ">=0.12.6 <1.0"
     },
     "require-dev": {
         "phpunit/phpunit": "^4.0 || ^5.0 || ^6.0 || ^7.0"