README bump

Author: j-mie6

Diff for: README.md

@@ -8,7 +8,7 @@ Parsley is a fast and modern parser combinator library for Scala based loosely o
 Parsley is distributed on Maven Central, and can be added to your project via:
 
 ```scala
-libraryDependencies += "com.github.j-mie6" %% "parsley" % "4.2.7"
+libraryDependencies += "com.github.j-mie6" %% "parsley" % "4.2.8"
 ```
 
 Documentation can be found [**here**](https://javadoc.io/doc/com.github.j-mie6/parsley_2.13/latest/index.html)