Bump phpdocumentor/reflection-docblock from 2.0.5 to 5.4.0

Bumps [phpdocumentor/reflection-docblock](https://github.com/phpDocumentor/ReflectionDocBlock) from 2.0.5 to 5.4.0.
- [Release notes](https://github.com/phpDocumentor/ReflectionDocBlock/releases)
- [Commits](phpDocumentor/ReflectionDocBlock@2.0.5...5.4.0)

---
updated-dependencies:
- dependency-name: phpdocumentor/reflection-docblock
  dependency-type: direct:development
  update-type: version-update:semver-major
...

Signed-off-by: dependabot[bot] <support@github.com>

composer.json

@@ -27,7 +27,7 @@
         "nanasess/ec-cube2-class-extends-stubs": "^1.0",
         "nanasess/eccube2-fixture-generator": "^2.0",
         "php5friends/phpunit48": ">=4.8.41",
-        "phpdocumentor/reflection-docblock": "~2.0.5",
+        "phpdocumentor/reflection-docblock": "~5.4.0",
         "phpstan/phpstan": "^1.10",
         "symfony/yaml": "^2.8 || ^3.4 || ^4.4"
     },