message: Fix TypeError when building for WebAssembly with Python 3
diff: @@ -103,7 +103,7 @@ def make_umd(opencvjs, cvjs):
  Module = {};
  return cv(Module);
  }));
  - """ % (content)).lstrip())
  + """ % (content)).lstrip().encode())
  if __name__ == "__main__":
  if len(sys.argv) > 2:
  