Overhaul repository with newest bestest practices

Add typing stub file
Add metadata tests
Add missing dev dependencies
Add merge conflict check pre-commit
Add tox env for py3.9
Update license from MIT to GPL3
Update pyproject with pypi metadata
Update makefile to reduce duplication and add missing targets
Update dependencies to latest versions
Update pre-commit config to piggy back on poetry env
Update pyproject to use poetry-core
Update toxfile to use locked dependencies
Remove unused codeowners file
Remove placeholder test

Makefile

@@ -1,12 +1,7 @@
 # Keyosk makefile for building and deployment prep
 
-VERSION           ?= $(shell cat pyproject.toml | grep "^version =" | cut -d "\"" -f 2)
-DOC_FORMAT        ?= html
-DOC_OPTIONS       ?=
-DOC_SOURCEDIR      = ./docs
-DOC_BUILDDIR       = ./docs/_build
-DOC_PROJECT        = keyosk
-DOCKER_CONTAINER   = keyosk
+VERSION  = $(shell cat pyproject.toml | grep "^version =" | cut -d "\"" -f 2)
+PROJECT  = keyosk
 
 .PHONY: help docs
 # Put it first so that "make" without argument is like "make help"
@@ -20,20 +15,20 @@ tox:
 	poetry run tox
 
 clean-tox:
-	rm -rf ./.mypy_cache
-	rm -rf ./.tox
-	rm -f .coverage
+	rm --recursive --force ./.mypy_cache
+	rm --recursive --force ./.tox
+	rm --force .coverage
 
 clean-py:
-	rm -rf ./dist
-	rm -rf ./build
-	rm -rf ./*/__pycache__
-	rm -rf ./*.egg-info
+	rm --recursive --force ./dist
+	rm --recursive --force ./build
+	rm --recursive --force ./*.egg-info
+	rm --recursive --force ./**/__pycache__
 
 clean-docs:
-	rm -rf $(DOC_BUILDDIR)
-	rm -f $(DOC_SOURCEDIR)/$(DOC_PROJECT)*.rst
-	rm -f $(DOC_SOURCEDIR)/modules.rst
+	rm --recursive --force ./docs/_build
+	rm --force ./docs/$(PROJECT)*.rst
+	rm --force ./docs/modules.rst
 
 clean: clean-tox clean-py clean-docs; ## Clean up all temp build/cache files and directories
 
@@ -43,10 +38,11 @@ wheel: ## Build Python binary wheel package for distribution
 source: ## Build Python source package for distribution
 	poetry build --format sdist
 
-build: clean-py tox; ## Test and build python distributions
-	poetry build
+test: clean-tox ## Run the project testsuite
+	poetry run tox
 
-docs: clean-docs ## Generate sphinx documentation, provide `DOC_FORMAT` to override default format of "html"
-	poetry run sphinx-apidoc -o "${DOC_SOURCEDIR}" "${DOC_PROJECT}"
-	rm $(DOC_SOURCEDIR)/modules.rst
-	poetry run sphinx-build -M $(DOC_FORMAT) "$(DOC_SOURCEDIR)" "$(DOC_BUILDDIR)" $(DOC_OPTIONS) $(0)
+publish: clean tox wheel source ## Build and upload to pypi (requires $PYPI_API_KEY be set)
+	@poetry publish --username __token__ --password $(PYPI_API_KEY)
+
+docs: clean-docs ## Generate documentation with Sphinx
+	poetry run tox -e docs