Changed subprocess run for chcek_output and decode bytes to utf-8 (#51)

Libraries/Python3/pineapple/helpers/uci_helpers.py

@@ -32,5 +32,5 @@ def uci_get(key: str) -> str:
     :return: str
     """
 
-    out = subprocess.run(["uci", "get", key])
+    out = subprocess.check_output(["uci", "get", key]).decode("utf-8")
-    return out.stdout
+    return out