Refactored sdp serializers

tests/test_sheerkaSerializer.py

@@ -0,0 +1,16 @@
+from sdp.sheerkaDataProvider import Event
+from sdp.sheerkaSerializer import Serializer
+from datetime import datetime
+
+
+def test_i_can_serialize_an_event():
+    event = Event("test", user="user", date=datetime.fromisoformat("2019-10-21T10:20:30.999"))
+    serializer = Serializer()
+
+    stream = serializer.serialize(event)
+    loaded = serializer.deserialize(stream)
+
+    assert event.version == loaded.version
+    assert event.user == loaded.user
+    assert event.date == loaded.date
+    assert event.message == loaded.message