chore: add a CHANGELOG entry for dfe68c6

Ref: phpDocumentor/ReflectionDocBlock#249

Author: williamdes

CHANGELOG.md

@@ -9,6 +9,7 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 ## [5.0.2] - 2020-xx-xx
 - Upgrade nikic/php-parser from 4.5.x to 4.6.x
 - Add an error for PHP versions below 7.1
+- Fixed an error due to [#249 on phpdocumentor/reflection-docblock](https://github.com/phpDocumentor/ReflectionDocBlock/issues/249)
 
 ## [5.0.1] - 2020-07-19
 - Fix a parsing error on "src/Parser/NodeVisitor"