Check that we read exactly uncompressedLen bytes

Signed-off-by: Graham <gpe@openrs2.dev>

cache/src/main/java/dev/openrs2/cache/Js5Compression.kt

@@ -152,6 +152,10 @@ public object Js5Compression {
                         }
                         remaining -= n
                     }
+
+                    if (inputStream.read() != -1) {
+                        throw IOException("Uncompressed data overflow")
+                    }
                 }
 
                 return output.retain()