Fixes the missing refmap for mixins

[Protonull]

Seems like the update from 0.11.0-SNAPSHOT to 0.12.0-SNAPSHOT broke something without causing compilation issues:

[10:36:25] [Render thread/ERROR]: Mixin apply for mod mapsync failed mapsync.common.mixins.json:MixinClientPacketListener from mod mapsync -> net.minecraft.class_634: org.spongepowered.asm.mixin.injection.throwables.InvalidInjectionException Critical injection failure: @Inject annotation on onHandleLogin could not find any targets matching 'handleLogin' in net.minecraft.class_634. No refMap loaded. [PREINJECT Applicator Phase -> mapsync.common.mixins.json:MixinClientPacketListener from mod mapsync -> Prepare Injections ->  -> handler$bki000$mapsync$onHandleLogin(Lnet/minecraft/class_2678;Lorg/spongepowered/asm/mixin/injection/callback/CallbackInfo;)V -> Parse]
org.spongepowered.asm.mixin.injection.throwables.InvalidInjectionException: Critical injection failure: @Inject annotation on onHandleLogin could not find any targets matching 'handleLogin' in net.minecraft.class_634. No refMap loaded. [PREINJECT Applicator Phase -> mapsync.common.mixins.json:MixinClientPacketListener from mod mapsync -> Prepare Injections ->  -> handler$bki000$mapsync$onHandleLogin(Lnet/minecraft/class_2678;Lorg/spongepowered/asm/mixin/injection/callback/CallbackInfo;)V -> Parse]
	at org.spongepowered.asm.mixin.injection.struct.InjectionInfo.validateTargets(InjectionInfo.java:658) ~[sponge-mixin-0.13.3+mixin.0.8.5.jar:0.13.3+mixin.0.8.5]
	at org.spongepowered.asm.mixin.injection.struct.InjectionInfo.findTargets(InjectionInfo.java:589) ~[sponge-mixin-0.13.3+mixin.0.8.5.jar:0.13.3+mixin.0.8.5]
	at org.spongepowered.asm.mixin.injection.struct.InjectionInfo.readAnnotation(InjectionInfo.java:330) ~[sponge-mixin-0.13.3+mixin.0.8.5.jar:0.13.3+mixin.0.8.5]
	at org.spongepowered.asm.mixin.injection.struct.InjectionInfo.<init>(InjectionInfo.java:316) ~[sponge-mixin-0.13.3+mixin.0.8.5.jar:0.13.3+mixin.0.8.5]
	at org.spongepowered.asm.mixin.injection.struct.InjectionInfo.<init>(InjectionInfo.java:308) ~[sponge-mixin-0.13.3+mixin.0.8.5.jar:0.13.3+mixin.0.8.5]
	at org.spongepowered.asm.mixin.injection.struct.CallbackInjectionInfo.<init>(CallbackInjectionInfo.java:46) ~[sponge-mixin-0.13.3+mixin.0.8.5.jar:0.13.3+mixin.0.8.5]
	at jdk.internal.reflect.GeneratedConstructorAccessor21.newInstance(Unknown Source) ~[?:?]
	at jdk.internal.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45) ~[?:?]
	at java.lang.reflect.Constructor.newInstanceWithCaller(Constructor.java:499) ~[?:?]
	at java.lang.reflect.Constructor.newInstance(Constructor.java:480) ~[?:?]
	at org.spongepowered.asm.mixin.injection.struct.InjectionInfo$InjectorEntry.create(InjectionInfo.java:149) ~[sponge-mixin-0.13.3+mixin.0.8.5.jar:0.13.3+mixin.0.8.5]
	at org.spongepowered.asm.mixin.injection.struct.InjectionInfo.parse(InjectionInfo.java:710) ~[sponge-mixin-0.13.3+mixin.0.8.5.jar:0.13.3+mixin.0.8.5]
	at org.spongepowered.asm.mixin.transformer.MixinTargetContext.prepareInjections(MixinTargetContext.java:1329) ~[sponge-mixin-0.13.3+mixin.0.8.5.jar:0.13.3+mixin.0.8.5]
	at org.spongepowered.asm.mixin.transformer.MixinApplicatorStandard.prepareInjections(MixinApplicatorStandard.java:1053) ~[sponge-mixin-0.13.3+mixin.0.8.5.jar:0.13.3+mixin.0.8.5]
	at org.spongepowered.asm.mixin.transformer.MixinApplicatorStandard.applyMixin(MixinApplicatorStandard.java:395) ~[sponge-mixin-0.13.3+mixin.0.8.5.jar:0.13.3+mixin.0.8.5]
	at org.spongepowered.asm.mixin.transformer.MixinApplicatorStandard.apply(MixinApplicatorStandard.java:327) ~[sponge-mixin-0.13.3+mixin.0.8.5.jar:0.13.3+mixin.0.8.5]
	at org.spongepowered.asm.mixin.transformer.TargetClassContext.apply(TargetClassContext.java:422) ~[sponge-mixin-0.13.3+mixin.0.8.5.jar:0.13.3+mixin.0.8.5]
	at org.spongepowered.asm.mixin.transformer.TargetClassContext.applyMixins(TargetClassContext.java:403) ~[sponge-mixin-0.13.3+mixin.0.8.5.jar:0.13.3+mixin.0.8.5]
	at org.spongepowered.asm.mixin.transformer.MixinProcessor.applyMixins(MixinProcessor.java:363) ~[sponge-mixin-0.13.3+mixin.0.8.5.jar:0.13.3+mixin.0.8.5]
	at org.spongepowered.asm.mixin.transformer.MixinTransformer.transformClass(MixinTransformer.java:234) ~[sponge-mixin-0.13.3+mixin.0.8.5.jar:0.13.3+mixin.0.8.5]
	at org.spongepowered.asm.mixin.transformer.MixinTransformer.transformClassBytes(MixinTransformer.java:202) ~[sponge-mixin-0.13.3+mixin.0.8.5.jar:0.13.3+mixin.0.8.5]
	at net.fabricmc.loader.impl.launch.knot.KnotClassDelegate.getPostMixinClassByteArray(KnotClassDelegate.java:422) ~[fabric-loader-0.15.10.jar:?]
	at net.fabricmc.loader.impl.launch.knot.KnotClassDelegate.tryLoadClass(KnotClassDelegate.java:323) ~[fabric-loader-0.15.10.jar:?]
	at net.fabricmc.loader.impl.launch.knot.KnotClassDelegate.loadClass(KnotClassDelegate.java:218) ~[fabric-loader-0.15.10.jar:?]
	at net.fabricmc.loader.impl.launch.knot.KnotClassLoader.loadClass(KnotClassLoader.java:119) ~[fabric-loader-0.15.10.jar:?]
	at java.lang.ClassLoader.loadClass(ClassLoader.java:525) ~[?:?]
	at squeek.appleskin.network.ClientSyncHandler.init(ClientSyncHandler.java:12) ~[appleskin-fabric-mc1.18.2-2.4.1.jar:?]
	at squeek.appleskin.AppleSkin.onInitializeClient(AppleSkin.java:20) ~[appleskin-fabric-mc1.18.2-2.4.1.jar:?]
	at net.fabricmc.loader.impl.FabricLoaderImpl.invokeEntrypoints(FabricLoaderImpl.java:384) [fabric-loader-0.15.10.jar:?]
	at net.fabricmc.loader.impl.game.minecraft.Hooks.startClient(Hooks.java:53) [fabric-loader-0.15.10.jar:?]
	at net.minecraft.class_310.<init>(class_310.java:452) [client-intermediary.jar:?]
	at net.minecraft.client.main.Main.main(Main.java:197) [client-intermediary.jar:?]
	at net.fabricmc.loader.impl.game.minecraft.MinecraftGameProvider.launch(MinecraftGameProvider.java:470) [fabric-loader-0.15.10.jar:?]
	at net.fabricmc.loader.impl.launch.knot.Knot.launch(Knot.java:74) [fabric-loader-0.15.10.jar:?]
	at net.fabricmc.loader.impl.launch.knot.KnotClient.main(KnotClient.java:23) [fabric-loader-0.15.10.jar:?]
	at org.prismlauncher.launcher.impl.StandardLauncher.launch(StandardLauncher.java:100) [NewLaunch.jar:?]
	at org.prismlauncher.EntryPoint.listen(EntryPoint.java:129) [NewLaunch.jar:?]
	at org.prismlauncher.EntryPoint.main(EntryPoint.java:70) [NewLaunch.jar:?]

This PR updates Architectury Loom to the latest version, which itself requires a newer version of Gradle, so I updated that to latest too.