Fix Stream did not contain valid UTF-8 (#282) (#332)

This fix is for some characters that were wrongly formatted because of lacking UTF-8

pynecone/compiler/utils.py

@@ -302,7 +302,7 @@ def write_page(path: str, code: str):
         code: The code to write.
     """
     utils.mkdir(os.path.dirname(path))
-    with open(path, "w") as f:
+    with open(path, "w", encoding="utf-8") as f:
         f.write(code)