Implement zlib compression of ws messages

src/ZlibCoder.ts

@@ -2,7 +2,7 @@ const zlib = require("zlib");
 
 export default class ZlibCoder {
 	static compress(input: string): Buffer {
-		return zlib.compress(input);
+		return zlib.deflateSync(input).toString('base64');
 	}
 
 	static decompress(input: Buffer): string {