Update default Mixin version to 0.16.5 (#374)

Author: lukebemish

gradle.properties

@@ -7,7 +7,7 @@ mergetool_version=2.0.0
 accesstransformers_version=11.0.2
 eventbus_version=8.0.5
 asm_version=9.7
-mixin_version=0.16.4+mixin.0.8.7
+mixin_version=0.16.5+mixin.0.8.7
 terminalconsoleappender_version=1.3.0
 nightconfig_version=3.8.0
 jetbrains_annotations_version=26.0.2

loader/src/main/java/net/neoforged/fml/loading/mixin/MixinFacade.java

@@ -86,7 +86,7 @@ private void gotoPhase(MixinEnvironment.Phase phase) {
     // Increment to break compatibility; during a BC window, this should be set to the latest version. This is _not_ set
     // to COMPATIBILITY_LATEST, so that if mixin is bumped past a BC it does not break mods.
     @VisibleForTesting
-    public static final int DEFAULT_BEHAVIOUR_VERSION = FabricUtil.COMPATIBILITY_0_14_0;
+    public static final int DEFAULT_BEHAVIOUR_VERSION = FabricUtil.COMPATIBILITY_0_16_5;
     @VisibleForTesting
     public static final ArtifactVersion HIGHEST_MIXIN_VERSION;
     @VisibleForTesting

loader/src/test/java/net/neoforged/fml/loading/MixinConfigTest.java

@@ -197,7 +197,7 @@ void testDuplicateMixinConfigs() throws Exception {
     void testRequestedMixinBehaviorIsValid() throws Exception {
         installation.setupProductionClient();
         installation.buildModJar("mixin-test.jar")
-                .withTestmodModsToml(modsToml -> modsToml.addMixinConfig("test.mixins.json", "0.14.0"))
+                .withTestmodModsToml(modsToml -> modsToml.addMixinConfig("test.mixins.json", "0.16.5"))
                 .addTextFile("test.mixins.json", "{}")
                 .build();