WIP: working on a full refactor for v2.0

This is still not functional, because it involves a LOT of changes to
the basic structure of the project. Some of the main changes can be seen
in the CHANGELOG.md file, if you're interested, but it boils down to
simplifying the logic of plugins (no more activation/deactivation
shenanigans), more robust typing and use of schemas (pydantic) to
avoid inconsistencies and user errors.

tests/test_models.py

@@ -26,14 +26,14 @@ from senpy.models import (Analysis,
                           EmotionAnalysis,
                           EmotionSet,
                           Entry,
-                          Error,
+                          ErrorResponse,
                           Results,
                           Sentiment,
                           SentimentPlugin,
                           Plugins,
                           from_string,
-                          from_dict,
-                          subtypes)
+                          from_dict)
+from senpy.errors import Error
 from senpy import plugins
 from pprint import pprint
 
@@ -117,7 +117,7 @@ class ModelsTest(TestCase):
 
     def test_plugins(self):
         self.assertRaises(Error, plugins.Plugin)
-        p = plugins.SentimentPlugin({"name": "dummy",
+        p = plugins.SentimentPlugin.parse_obj({"name": "dummy",
                                      "description": "I do nothing",
                                      "version": 0,
                                      "extra_params": {
@@ -152,11 +152,6 @@ class ModelsTest(TestCase):
         s = str(r)
         assert "_testing" not in s
 
-    def test_serialize(self):
-        for k, v in subtypes().items():
-            e = v()
-            e.serialize()
-
     def test_turtle(self):
         """Any model should be serializable as a turtle file"""
         ana = EmotionAnalysis()