Fix several issues running production jar

Author: embeddedt

build.gradle.kts

@@ -83,7 +83,10 @@ mixin {
 
 tasks.named<Jar>("jar") {
     manifest.attributes(mapOf(
-        "MixinConfigs" to "modernfix-modernfix.mixins.json"
+        "MixinConfigs" to "modernfix-modernfix.mixins.json",
+        "Specification-Version" to "1",
+        "Implementation-Title" to project.name,
+        "Implementation-Version" to version
     ))
 }
 
@@ -127,8 +130,15 @@ repositories {
     }
 }
 
+val embed by configurations.creating {
+    isCanBeConsumed = false
+    isCanBeResolved = true
+    isTransitive = true
+}
+
 dependencies {
     implementation(project(":annotations"))
+    embed(project(":annotations"))
     "additionalRuntimeClasspath"(project(":annotations"))
     annotationProcessor(project(path = ":annotation-processor", configuration = "shadow"))
 
@@ -151,6 +161,10 @@ dependencies {
     modCompileOnly("curse.maven:kubejs-238086:5853326")
 }
 
+tasks.named<Jar>("jar") {
+    from(embed.map { if (it.isDirectory) it else zipTree(it) })
+}
+
 // For the AP
 tasks.withType<JavaCompile>().configureEach {
     if (!name.lowercase().contains("test")) {
@@ -186,7 +200,7 @@ val finalJarTask = "reobfJar"
 tasks.register<Copy>("copyJarNameConsistent") {
     from(tasks.named<Jar>(finalJarTask).get().outputs.files)
     into(project.file("build/libs"))
-    rename { name -> "modernfix-" + project.name + "-latest.jar" }
+    rename { _ -> "modernfix-" + project.name + "-latest.jar" }
 }
 
 tasks.register<Copy>("copyJarToBin") {

src/main/java/org/embeddedt/modernfix/core/ModernFixMixinPlugin.java

@@ -114,7 +114,7 @@ public void onLoad(String mixinPackage) {
 
     @Override
     public String getRefMapperConfig() {
-        return null;
+        return "modernfix.refmap.json";
     }
 
     @Override