Move Coverage config into pyproject.toml (#575)

* Move Coverage config into `pyproject.toml`

* Update badge in README

* Use correct format for `source` in coverage config

Author: puddly

.coveragerc

@@ -1,7 +1,7 @@
 # bellows
 
 [![Build](https://github.com/zigpy/bellows/workflows/CI/badge.svg?branch=dev)](https://github.com/zigpy/bellows/workflows/CI/badge.svg?branch=dev)
-[![Coverage](https://coveralls.io/repos/github/zigpy/bellows/badge.svg?branch=dev)](https://coveralls.io/github/zigpy/bellows?branch=dev)
+[![Coverage Status](https://codecov.io/gh/zigpy/bellows/branch/dev/graph/badge.svg?token=Y1994N9D74)](https://codecov.io/gh/zigpy/bellows)
 
 `bellows` is a Python 3 library implementation for the [zigpy](https://github.com/zigpy/zigpy) project to add Zigbee radio support for Silicon Labs EM35x ("Ember") and EFR32 ("Mighty Gecko") based Zigbee coordinator devices using the EZSP (EmberZNet Serial Protocol) interface.
 

README.md

@@ -63,4 +63,11 @@ max-line-length = 88
 # E501: line too long
 # D202 No blank lines allowed after function docstring
 ignore = ["W503", "E203", "E501", "D202"]
-per-file-ignores = ["tests/*:F811,F401,F403"]
+per-file-ignores = ["tests/*:F811,F401,F403"]
+
+[tool.coverage.run]
+source = ["bellows"]
+omit = [
+    "bellows/cli/*.py",
+    "bellows/typing.py",
+]