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

pyproject.toml

@@ -0,0 +1,57 @@
+[tool.poetry]
+name = "python-kasa"
+version = "0.4.0.dev0"
+description = "Python API for TP-Link Kasa Smarthome devices"
+license = "GPL-3.0-or-later"
+authors = ["Your Name <you@example.com>"]
+repository = "https://github.com/python-kasa/python-kasa"
+readme = "README.md"
+packages = [
+  { include = "kasa" }
+]
+
+[tool.poetry.scripts]
+kasa = "kasa.cli:cli"
+
+[tool.poetry.dependencies]
+python = "^3.7"
+importlib-metadata = "*"
+asyncclick = "^7"
+
+[tool.poetry.dev-dependencies]
+pytest = "^5"
+pytest-azurepipelines = "^0.8"
+pytest-cov = "^2.8"
+pytest-asyncio = "^0.11"
+pytest-sugar = "*"
+pre-commit = "*"
+voluptuous = "*"
+toml = "*"
+tox = "*"
+pytest-mock = "^3.1.0"
+codecov = "^2.0"
+
+[tool.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 = ["asyncclick", "pytest", "setuptools", "voluptuous"]
+
+[tool.coverage.run]
+source = ["kasa"]
+branch = true
+omit = ["kasa/cli.py", "kasa/tests/*"]
+
+[tool.coverage.report]
+exclude_lines = [
+  # ignore abstract methods
+  "raise NotImplementedError",
+  "def __repr__"
+]
+
+[build-system]
+requires = ["poetry>=0.12"]
+build-backend = "poetry.masonry.api"