added changelog for

* v1.0.0
* v1.1.0

CHANGELOG.md

@@ -0,0 +1,17 @@
+# Changelog
+
+## Version 1.1.0
+No major changes introduced, getting ready for release
+
+### Added
+* unit tests via `PHPUnit`
+
+### Changed
+* Parser does not generate unnessecary empty paragraphs anymore
+* Fix: parse does not get stuck on blockquotes that are not followed by an empty line anymore
+
+### Removed
+* "Monkey test" `.md` files in `tests` folder
+
+## Version 1.0.0
+Basic implementation