Refactor docblock annotation parser (#511)

Author: Simon Mönch

box.json.dist

@@ -10,7 +10,6 @@
     ],
 
     "files": [
-        "res/annotation-grammar.pp",
         "res/schema.json"
     ],
     "directories-bin": [".requirement-checker"],

composer.json

@@ -43,19 +43,19 @@
     "require": {
         "php": "^7.3",
         "ext-phar": "*",
+        "composer-plugin-api": "^1.0 || ^2.0",
         "amphp/parallel-functions": "^0.1.3",
         "beberlei/assert": "^3.2",
         "composer/package-versions-deprecated": "^1.8",
         "composer/semver": "^3.2",
         "composer/xdebug-handler": "^1.3.2",
-        "composer-plugin-api": "^1.0 || ^2.0",
-        "hoa/compiler": "^3.17",
         "humbug/php-scoper": "^0.13.10",
         "justinrainbow/json-schema": "^5.2.9",
         "nikic/iter": "^2.0",
         "nikic/php-parser": "^4.2",
         "opis/closure": "^3.2",
         "paragonie/pharaoh": "^0.5",
+        "phpdocumentor/reflection-docblock": "^5.2",
         "psr/log": "^1.0",
         "seld/jsonlint": "^1.7",
         "symfony/console": "^4.3.5",