Apply mixins to client side only

Author: LeafHacker

CHANGELOG.md

@@ -4,6 +4,7 @@
 - Added flatten method to IValue
 - Added an EventState to GuiDisplayEvent
 ### Changed
+- Mixins are now only applied client-side
 - Made MotionUpdateEvent cancellable
 - Made UpdateEvent cancellable
 ### Fixed

src/main/resources/mixins.capi.json

@@ -4,7 +4,7 @@
   "refmap": "mixins.capi.refmap.json",
   "compatibilityLevel": "JAVA_8",
   "verbose": false,
-  "mixins": [
+  "client": [
     "MixinBlock",
     "MixinEntity",
     "MixinEntityLivingBase",