Update MetadataConverter.mjs

Author: PiSaucer

src/converter/MetadataConverter.mjs

@@ -40,7 +40,7 @@ class MetadataConverter extends AbstractConverter {
 
         MetadataConverter.mcmeta = JSON.parse((await this.output.read(from)).toString("utf8").trim()); // trim it to supports UF8 files with 'BOOM' at the beginning
 
-        if (MetadataConverter.mcmeta.pack.pack_format !== 4 && MetadataConverter.mcmeta.pack.pack_format !== 5 && MetadataConverter.mcmeta.pack.pack_format !== 6) {
+        if (MetadataConverter.mcmeta.pack.pack_format !== 4 && MetadataConverter.mcmeta.pack.pack_format !== 5 && MetadataConverter.mcmeta.pack.pack_format !== 6 && MetadataConverter.mcmeta.pack.pack_format !== 8) {
             throw new Error("Only supports pack_format 4 (v1.13 or v1.14) or 5 (v1.15 or v1.16) or 6 (>= v1.16.2)!");
         }