Add api-version, tweak version pattern to support pre releases

Fixes #638
Fixes #636
Fixes #626

src/main/java/com/comphenix/protocol/utility/MinecraftVersion.java

@@ -42,7 +42,7 @@ public class MinecraftVersion implements Comparable<MinecraftVersion>, Serializa
 	/**
 	 * Regular expression used to parse version strings.
 	 */
-	private static final Pattern VERSION_PATTERN = Pattern.compile(".*\\(.*MC.\\s*([a-zA-z0-9\\-\\.]+)\\s*\\)");
+	private static final Pattern VERSION_PATTERN = Pattern.compile(".*\\(.*MC.\\s*([a-zA-z0-9\\-.]+).*");
 
 	/**
 	 * Version 1.14 - village and pillage update.

src/main/resources/plugin.yml

@@ -6,6 +6,7 @@ authors: [dmulloy2, comphenix]
 main: com.comphenix.protocol.ProtocolLib
 load: STARTUP
 database: false
+api-version: "1.13"
 
 commands:
   protocol: