Install build dependencies in a consistent manner

Makefile

@@ -1,20 +1,17 @@
-SHELL=/bin/bash
-
 test_deps:
-	pip install coverage flake8 wheel pyyaml boto3
+	pip install .[tests]
 
 lint: test_deps
-	flake8
+	flake8 $$(python setup.py --name)
 
 test: test_deps lint
-	coverage run --source=watchtower ./test/test.py
+	coverage run --source=$$(python setup.py --name) ./test/test.py -v
 
 docs:
 	sphinx-build docs docs/html
 
 install: clean
-	pip install wheel
-	python ./setup.py bdist_wheel
+	python -m build .
 	pip install --upgrade dist/*.whl
 
 clean:

setup.py

@@ -15,10 +15,16 @@
     install_requires=[
         "boto3 >= 1.9.253, < 2",
     ],
-    tests_require=[
-        "pyyaml >= 5.3.1, < 6",
-        "flake8 >= 4.0.1, < 5"
-    ],
+    extras_require={
+        "tests": [
+            "pyyaml >= 5.3.1, < 6",
+            "flake8 >= 4.0.1, < 5",
+            "coverage",
+            "build",
+            "wheel",
+            "mypy"
+        ]
+    },
     packages=find_packages(exclude=["test"]),
     platforms=["MacOS X", "Posix"],
     include_package_data=True,