chore: update phpdocumentor/reflection-docblock from 3.3.0 to 4.0.0 (#17)

BREAKING CHANGE: The major update may conflict with version requirements of other modules.

closes #12

Author: dependencies[bot]

composer.json

@@ -22,7 +22,7 @@
     "require": {
         "php": ">=7.0",
         "netresearch/jsonmapper": "^1.0",
-        "phpdocumentor/reflection-docblock": "^3.1"
+        "phpdocumentor/reflection-docblock": "^4.0.0"
     },
     "require-dev": {
         "phpunit/phpunit": "^5.5"