tests: Replace umodule with module everywhere.

This work was funded through GitHub Sponsors.

Signed-off-by: Jim Mussared <jim.mussared@gmail.com>

tests/extmod/json_loads_bytes.py

@@ -0,0 +1,10 @@
+# test loading from bytes and bytearray (introduced in Python 3.6)
+
+try:
+    import json
+except ImportError:
+    print("SKIP")
+    raise SystemExit
+
+print(json.loads(b"[1,2]"))
+print(json.loads(bytearray(b"[null]")))