[libgdx] Depending on libGDX snapshot builds for now.

spine-libgdx/spine-libgdx/pom.xml

@@ -51,7 +51,7 @@
 
 	<properties>
 		<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
-		<gdx.version>1.9.10</gdx.version>
+		<gdx.version>1.9.11-SNAPSHOT</gdx.version>
 	</properties>
 
 	<build>
@@ -76,8 +76,8 @@
 				<artifactId>maven-compiler-plugin</artifactId>
 				<version>3.1</version>
 				<configuration>
-					<source>1.6</source>
-					<target>1.6</target>
+					<source>1.8</source>
+					<target>1.8</target>
 					<fork>true</fork>
 					<showWarnings>true</showWarnings>
 				</configuration>