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

tox.ini

@@ -1,16 +1,35 @@
 [tox]
-envlist=py37,py38,flake8,linting,typing
+envlist=py37,py38,flake8,lint,coverage
 skip_missing_interpreters = True
+isolated_build = True
 
-[tox:travis]
-3.7 = py37
-3.8 = py38
 
 [testenv]
-passenv = TRAVIS TRAVIS_JOB_ID TRAVIS_BRANCH
-deps = -r{toxinidir}/requirements_test.txt
-commands=
-    pytest --cov --cov-config=tox.ini kasa
+whitelist_externals =
+  poetry
+  coverage
+commands =
+    poetry install -v
+    poetry run pytest --cov kasa/tests/
+
+[testenv:clean]
+deps = coverage
+skip_install = true
+commands = coverage erase
+
+[testenv:py37]
+commands = coverage run -m pytest {posargs}
+
+[testenv:py38]
+commands = coverage run -m pytest {posargs}
+
+[testenv:coverage]
+basepython = python3.8
+skip_install = true
+deps = coverage[toml]
+commands =
+  coverage report
+  coverage html
 
 [testenv:flake8]
 deps=
@@ -18,44 +37,7 @@ deps=
   flake8-docstrings
 commands=flake8 kasa
 
-[testenv:typing]
-skip_install=true
-deps=mypy
-commands=mypy --ignore-missing-imports kasa
-
-[flake8]
-exclude = .git,.tox,__pycache__,kasa/tests/newfakes.py,kasa/tests/test_fixtures.py
-max-line-length = 88
-per-file-ignores =
-  kasa/tests/*.py:D100,D101,D102,D103,D104
-  setup.py:D100
-ignore = D105, D107, E203, E501, W503
-#ignore = E203, E266, E501, W503, F403, F401
-#max-complexity = 18
-#select = B,C,E,F,W,T4,B9
-
 [testenv:lint]
 deps = pre-commit
 skip_install = true
 commands = pre-commit run --all-files
-
-[coverage:run]
-source = kasa
-branch = True
-omit =
-  kasa/tests/*
-
-[coverage:report]
-exclude_lines =
-  # ignore abstract methods
-  raise NotImplementedError
-  def __repr__
-
-[isort]
-multi_line_output=3
-include_trailing_comma=True
-force_grid_wrap=0
-use_parentheses=True
-line_length=88
-known_first_party=kasa
-known_third_party=click,pytest,setuptools,voluptuous