Add pack format 18 for 1.20.2

Author: RedNesto

src/main/kotlin/platform/forge/util/ForgePackDescriptor.kt

@@ -53,6 +53,7 @@ data class ForgePackDescriptor(val format: Int, val comment: String) {
         val FORMAT_10 = ForgePackDescriptor(10, "")
         val FORMAT_12 = ForgePackDescriptor(12, "")
         val FORMAT_15 = ForgePackDescriptor(15, "")
+        val FORMAT_18 = ForgePackDescriptor(18, "")
 
         // See https://minecraft.gamepedia.com/Tutorials/Creating_a_resource_pack#.22pack_format.22
         fun forMcVersion(version: SemanticVersion): ForgePackDescriptor? = when {
@@ -65,7 +66,8 @@ data class ForgePackDescriptor(val format: Int, val comment: String) {
             version < MinecraftVersions.MC1_19 -> FORMAT_9
             version < MinecraftVersions.MC1_19_3 -> FORMAT_10
             version < MinecraftVersions.MC1_20 -> FORMAT_12
-            version >= MinecraftVersions.MC1_20 -> FORMAT_15
+            version < MinecraftVersions.MC1_20_2 -> FORMAT_15
+            version >= MinecraftVersions.MC1_20_2 -> FORMAT_18
             else -> null
         }
     }

src/main/kotlin/util/MinecraftVersions.kt

@@ -35,6 +35,7 @@ object MinecraftVersions {
     val MC1_19_3 = SemanticVersion.release(1, 19, 3)
     val MC1_19_4 = SemanticVersion.release(1, 19, 4)
     val MC1_20 = SemanticVersion.release(1, 20)
+    val MC1_20_2 = SemanticVersion.release(1, 20, 2)
 
     fun requiredJavaVersion(minecraftVersion: SemanticVersion) = when {
         minecraftVersion <= MC1_16_5 -> JavaSdkVersion.JDK_1_8