Convert to use poetry & pyproject.toml for dep & build management (#54)

* Convert to use poetry and pyproject.toml, update README

* add some resources for contributors

* minor adjustments

* ci: separate tests from linting, run using poetry

* add pytest-mock to dev requirements

* combine running tests and reporting to codecov

* generate both xml and html coverage reports

* add codecov to dev dependencies

kasa/tests/newfakes.py

@@ -1,7 +1,16 @@
 import logging
 import re
 
-from voluptuous import REMOVE_EXTRA, All, Any, Coerce, Invalid, Optional, Range, Schema
+from voluptuous import (  # type: ignore
+    REMOVE_EXTRA,
+    All,
+    Any,
+    Coerce,
+    Invalid,
+    Optional,
+    Range,
+    Schema,
+)
 
 from ..protocol import TPLinkSmartHomeProtocol