Add removal of overlooked temp assets to clean make target

Expand all flags to full version for future reference

Makefile

@@ -1,8 +1,5 @@
 # tox-poetry-installer makefile
 
-# You can set these variables from the command line
-PROJECT = tox_poetry_installer
-
 .PHONY: help
 # Put it first so that "make" without argument is like "make help"
 # Adapted from:
@@ -11,19 +8,18 @@ help: ## List Makefile targets
 	$(info Makefile documentation)
 	@grep -E '^[a-zA-Z_-]+:.*?## .*$$' $(MAKEFILE_LIST) | sort | awk 'BEGIN {FS = ":.*?## "}; {printf "\033[36m%-10s\033[0m %s\n", $$1, $$2}'
 
-tox: clean
-	tox
-
 clean-tox:
-	rm -rf ./.mypy_cache
-	rm -rf ./.tox
-	rm -f .coverage
+	rm --recursive --force ./.mypy_cache
+	rm --recursive --force ./.tox
+	rm --recursive --force tests/__pycache__/
+	rm --recursive --force .pytest_cache/
+	rm --force .coverage
 
 clean-py:
-	rm -rf ./dist
-	rm -rf ./build
-	rm -rf ./*.egg-info
-	rm -rf __pycache__/
+	rm --recursive --force ./dist
+	rm --recursive --force ./build
+	rm --recursive --force ./*.egg-info
+	rm --recursive --force __pycache__/
 
 clean: clean-tox clean-py; ## Clean temp build/cache files and directories
 
@@ -34,4 +30,4 @@ source: ## Build Python source distribution package
 	poetry build --format sdist
 
 test: ## Run the project testsuite(s)
-	poetry run tox -r
+	poetry run tox --recreate