Fix record signatures based on data provided by mappings. (#507)

Reads "extras/record_signatures.json" from mappings jar, just works with yarn.

Mojmap:

```
mappings loom.layered {
   officialMojangMappings()
   signatureFix("net.fabricmc:yarn:21w38a+build.9:v2")
}
```

5 files changed, 20 insertions, 16 deletions

diff --git a/src/test/resources/projects/java16/build.gradle b/src/test/resources/projects/java16/build.gradle
index 7372d08b..45acf714 100644
--- a/src/test/resources/projects/java16/build.gradle
+++ b/src/test/resources/projects/java16/build.gradle
@@ -10,12 +10,16 @@ archivesBaseName = project.archives_base_name
 version = project.mod_version
 group = project.maven_group
 
+loom {
+	accessWidenerPath = file("src/main/resources/modid.accesswidener")
+}
+
 dependencies {
 	// To change the versions see the gradle.properties file
 	minecraft "com.mojang:minecraft:${project.minecraft_version}"
 	mappings "net.fabricmc:yarn:${project.yarn_mappings}:v2"
 	modImplementation "net.fabricmc:fabric-loader:${project.loader_version}"
-	//modImplementation "net.fabricmc.fabric-api:fabric-api:${project.fabric_version}"
+	modImplementation "net.fabricmc.fabric-api:fabric-api:${project.fabric_version}"
 }
 
 tasks.withType(JavaCompile).configureEach {
diff --git a/src/test/resources/projects/java16/gradle.properties b/src/test/resources/projects/java16/gradle.properties
index 5c21b1cb..941d7f52 100644
--- a/src/test/resources/projects/java16/gradle.properties
+++ b/src/test/resources/projects/java16/gradle.properties
@@ -1,9 +1,9 @@
 org.gradle.jvmargs=-Xmx1G
 
-minecraft_version=21w37a
-yarn_mappings=21w37a+build.5
+minecraft_version=21w38a
+yarn_mappings=21w38a+build.9
 loader_version=0.11.7
-fabric_version=0.37.1+1.17
+fabric_version=0.40.4+1.18
 
 mod_version = 1.0.0
 maven_group = com.example
diff --git a/src/test/resources/projects/java16/src/main/java/net/fabricmc/example/mixin/ExampleMixin.java b/src/test/resources/projects/java16/src/main/java/net/fabricmc/example/mixin/ExampleMixin.java
index 83ee1a89..60002d28 100644
--- a/src/test/resources/projects/java16/src/main/java/net/fabricmc/example/mixin/ExampleMixin.java
+++ b/src/test/resources/projects/java16/src/main/java/net/fabricmc/example/mixin/ExampleMixin.java
@@ -1,15 +1,11 @@
 package net.fabricmc.example.mixin;
 
-import net.minecraft.client.gui.screen.TitleScreen;
+import net.minecraft.world.chunk.PalettedContainer;
 import org.spongepowered.asm.mixin.Mixin;
-import org.spongepowered.asm.mixin.injection.At;
-import org.spongepowered.asm.mixin.injection.Inject;
-import org.spongepowered.asm.mixin.injection.callback.CallbackInfo;
+import org.spongepowered.asm.mixin.Shadow;
 
-@Mixin(TitleScreen.class)
-public class ExampleMixin {
-	@Inject(at = @At("HEAD"), method = "init()V")
-	private void init(CallbackInfo info) {
-		System.out.println("This line is printed by an example mod mixin!");
-	}
-}
+@Mixin(PalettedContainer.class)
+public abstract class ExampleMixin<T> {
+	@Shadow
+	private volatile PalettedContainer.Data<T> data;
+}
\ No newline at end of file
diff --git a/src/test/resources/projects/java16/src/main/resources/fabric.mod.json b/src/test/resources/projects/java16/src/main/resources/fabric.mod.json
index 9c6ccfa9..27a8bdf7 100644
--- a/src/test/resources/projects/java16/src/main/resources/fabric.mod.json
+++ b/src/test/resources/projects/java16/src/main/resources/fabric.mod.json
@@ -32,5 +32,6 @@
   },
   "suggests": {
     "another-mod": "*"
-  }
+  },
+  "accessWidener" : "modid.accesswidener"
 }
diff --git a/src/test/resources/projects/java16/src/main/resources/modid.accesswidener b/src/test/resources/projects/java16/src/main/resources/modid.accesswidener
new file mode 100644
index 00000000..0f681e38
--- /dev/null
+++ b/src/test/resources/projects/java16/src/main/resources/modid.accesswidener
@@ -0,0 +1,3 @@
+accessWidener	v1	named
+
+accessible    class    net/minecraft/world/chunk/PalettedContainer$Data