Downgrade phpdocumentor/type-resolver to 0.3

In order to restore a bc break made in 3.2.0 I downgraded the
type-resolver. This makes the version less compatible with php 7.1
But will help our users to upgrade.

Author: jaapio

composer.json

@@ -12,7 +12,7 @@
     "require": {
         "php": ">=5.5",
         "phpdocumentor/reflection-common": "^1.0@dev",
-        "phpdocumentor/type-resolver": "^0.4.0",
+        "phpdocumentor/type-resolver": "^0.3.0",
         "webmozart/assert": "^1.0"
     },
     "autoload": {