Make the Makefile more useful

Signed-off-by: Brian Warner <[email protected]>

Makefile

@@ -1,10 +1,19 @@
 clean:
-
 	rm -rf \
 	__pycache__ \
 	src/talkgooder/__pycache__ \
+	tests/__pycache__ \
 	.pytest_cache \
 	dist \
 	_version.py \
 	src/*.egg-info \
 	docsrc/_doctrees
+
+test:
+	pytest
+
+build: clean test
+	python3 -m build
+
+html: build
+	sphinx-build -b html docsrc docs -E -d "docsrc/_doctrees"