Merge pull request #708 from phpmd-team/release-2.8.0

Add PHPMD 2.8.0 changelog

CHANGELOG

@@ -1,3 +1,17 @@
+phpmd-2.8.0 (2019/12)
+========================
+
+- Added #497: Undefined variable rule
+- Improved performances by disabling XDebug if in use
+- Added #571: ignore-namespaces property to DevelopmentCodeFragment rule
+- Added #595: Renderer which writes an ansi report string
+- Fixed #657: IfStatementAssignment violation message
+- Optimized Composer autoloader when building Phar
+- Fixed #661: IfStatementAssignment thrown incorrectly
+- Fixed #676: Handle @SuppressWarnings on each method for CountInLoop
+- Fixed #659: PHP 7.4 compatibility for implode() usage
+
+
 phpmd-2.7.0 (2019/07/30)
 ========================