Introduce hid_parser tests

Add basic tests to cover the package.

tests/hid_parser/test_data.py

@@ -0,0 +1,15 @@
+from hid_parser.data import Button
+from hid_parser.data import Consumer
+
+
+def test_consumer():
+    consumer = Consumer()
+
+    assert consumer.PLAY_PAUSE == 0xCD
+
+
+def test_button():
+    button = Button()
+
+    assert button.NO_BUTTON == 0x0
+    assert button.BUTTON_1 == 0x1