Fixed build

Author: ondrejmirtes

.travis.yml

@@ -9,6 +9,6 @@ script:
   - vendor/bin/phing
   - >
     wget https://github.com/maglnet/ComposerRequireChecker/releases/download/0.2.1/composer-require-checker.phar
-    && php composer-require-checker.phar check composer.json
+    && php composer-require-checker.phar check --config-file $(pwd)/composer-require-checker.json composer.json
 after_script:
   - php vendor/bin/coveralls -v

composer-require-checker.json

@@ -0,0 +1,19 @@
+{
+	"symbol-whitelist" : [
+		"null", "true", "false",
+		"static", "self", "parent",
+		"array", "string", "int", "float", "bool", "iterable", "callable", "void", "object",
+		"Doctrine\\ORM\\Query\\QueryException"
+	],
+	"php-core-extensions" : [
+		"Core",
+		"date",
+		"pcre",
+		"Phar",
+		"Reflection",
+		"SPL",
+		"standard",
+		"pcntl",
+		"mbstring"
+	]
+}