Update README.md

Switched out 0.27 for 3.0

Author: j-mie6

README.md

@@ -3,7 +3,7 @@
 ## What is Parsley?
 Parsley is a very fast parser combinator library for Scala based on a Haskell-style Parsec API.
 
-## How do I use it? [![Scaladoc](https://javadoc-badge.appspot.com/com.github.j-mie6/parsley_2.13.svg?label=scaladoc)](https://javadoc-badge.appspot.com/com.github.j-mie6/parsley_2.13) [![Maven Central](https://img.shields.io/maven-central/v/com.github.j-mie6/parsley_2.12?label=maven-central-2.12)](https://mvnrepository.com/artifact/com.github.j-mie6/parsley_2.12) [![Maven Central](https://img.shields.io/maven-central/v/com.github.j-mie6/parsley_2.13?label=maven-central-2.13)](https://mvnrepository.com/artifact/com.github.j-mie6/parsley_2.13) [![Maven Central](https://img.shields.io/maven-central/v/com.github.j-mie6/parsley_0.27?label=maven-central-0.27)](https://mvnrepository.com/artifact/com.github.j-mie6/parsley_0.27)
+## How do I use it? [![Scaladoc](https://javadoc-badge.appspot.com/com.github.j-mie6/parsley_2.13.svg?label=scaladoc)](https://javadoc-badge.appspot.com/com.github.j-mie6/parsley_2.13) [![Maven Central](https://img.shields.io/maven-central/v/com.github.j-mie6/parsley_2.12?label=maven-central-2.12)](https://mvnrepository.com/artifact/com.github.j-mie6/parsley_2.12) [![Maven Central](https://img.shields.io/maven-central/v/com.github.j-mie6/parsley_2.13?label=maven-central-2.13)](https://mvnrepository.com/artifact/com.github.j-mie6/parsley_2.13) [![Maven Central](https://img.shields.io/maven-central/v/com.github.j-mie6/parsley_3.0.0-M3?label=maven-central-3.0.0-M3)](https://mvnrepository.com/artifact/com.github.j-mie6/parsley_3.0.0-M3) <!--[![Maven Central](https://img.shields.io/maven-central/v/com.github.j-mie6/parsley_0.27?label=maven-central-0.27)](https://mvnrepository.com/artifact/com.github.j-mie6/parsley_0.27)-->
 
 Parsley is distributed on Maven Central, and can be added to your project via: