tests: Replace umodule with module everywhere.

This work was funded through GitHub Sponsors.

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

tests/extmod/binascii_hexlify.py

@@ -0,0 +1,19 @@
+try:
+    import binascii
+except ImportError:
+    print("SKIP")
+    raise SystemExit
+
+for x in (
+    b"\x00\x01\x02\x03\x04\x05\x06\x07",
+    b"\x08\x09\x0a\x0b\x0c\x0d\x0e\x0f",
+    b"\x7f\x80\xff",
+    b"1234ABCDabcd",
+):
+    print(binascii.hexlify(x))
+
+# Two-argument version (now supported in CPython)
+print(binascii.hexlify(b"123", ":"))
+
+# zero length buffer
+print(binascii.hexlify(b"", b":"))