mentioning tests in readme

CHANGELOG.md

@@ -8,7 +8,8 @@ No major changes introduced, getting ready for release
 
 ### 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
+* 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

README.md

@@ -111,3 +111,10 @@ or via reference to [a later defined url][massivedynamic], i we so desire.
 ```
 
 [massivedynamic]: https://massivedynamic.eu
+
+## Testing
+Unit tests can be run via `composer`:
+
+```
+	composer test
+```