Update Sponge implementation for Minecraft 1.9.4

worldedit-sponge/build.gradle

@@ -9,7 +9,7 @@ buildscript {
 
     dependencies {
         classpath 'net.minecrell:VanillaGradle:2.0.3_1'
-        classpath 'net.minecraftforge.gradle:ForgeGradle:2.1-SNAPSHOT'
+        classpath 'net.minecraftforge.gradle:ForgeGradle:2.2-SNAPSHOT'
     }
 }
 
@@ -21,7 +21,7 @@ apply plugin: 'net.minecrell.vanilla.server.library'
 
 dependencies {
     compile project(':worldedit-core')
-    compile 'org.spongepowered:spongeapi:4.1.0-SNAPSHOT'
+    compile 'org.spongepowered:spongeapi:5.0.0-SNAPSHOT'
     testCompile group: 'org.mockito', name: 'mockito-core', version:'1.9.0-rc1'
 }
 
@@ -35,8 +35,8 @@ sponge {
 }
 
 minecraft {
-    version = "1.8.9"
-    mappings = "stable_22"
+    version = "1.9.4"
+    mappings = 'snapshot_20160521'
     runDir = 'run'
 }