Update version to 4.8.0 for release

Author: dmulloy2

pom.xml

@@ -4,7 +4,7 @@
 	<groupId>com.comphenix.protocol</groupId>
 	<artifactId>ProtocolLib</artifactId>
 	<name>ProtocolLib</name>
-	<version>4.8.0-SNAPSHOT</version>
+	<version>4.8.0</version>
 
 	<description>Provides read/write access to the Minecraft protocol.</description>
 	<url>https://github.com/dmulloy2/ProtocolLib</url>