upgrade black; remove `pylint` from `tests_require`

Pipfile

@@ -9,7 +9,7 @@ free-disk = {editable = true, path = "."}
 [dev-packages]
 # black requires python>=3.6
 # https://github.com/psf/black/commit/e74117f172e29e8a980e2c9de929ad50d3769150#diff-2eeaed663bd0d25b7e608891384b7298R51
-black = {version = "==19.10b0", markers = "python_version >= '3.6'"}
+black = {version = "==20.8b1", markers = "python_version >= '3.6'"}
 mypy = {version = "*", markers = "python_version >= '3.5'"}
 # v2.4.0 dropped python3.4 support
 # https://github.com/PyCQA/pylint/commit/927db96bbd343a61428faa0249fdeec58cfb3ebe

Pipfile.lock

@@ -1,7 +1,7 @@
 {
     "_meta": {
         "hash": {
-            "sha256": "0eafb6b912df158e9974854bf57c6a8b5aab6d9f5de92e7d66696ff30b5db55f"
+            "sha256": "3fac005880c60c7a7acd71f56b868fef8c4f76f34292919068333112484afadf"
         },
         "pipfile-spec": 6,
         "requires": {
@@ -55,12 +55,11 @@
         },
         "black": {
             "hashes": [
-                "sha256:1b30e59be925fafc1ee4565e5e08abef6b03fe455102883820fe5ee2e4734e0b",
-                "sha256:c2edb73a08e9e0e6f65a0e6af18b059b8b1cdd5bef997d7a0b181df93dc81539"
+                "sha256:1c02557aa099101b9d21496f8a914e9ed2222ef70336404eeeac8edba836fbea"
             ],
             "index": "pypi",
             "markers": "python_version >= '3.6'",
-            "version": "==19.10b0"
+            "version": "==20.8b1"
         },
         "click": {
             "hashes": [

setup.py

@@ -20,7 +20,14 @@ setuptools.setup(
     author_email="fabian@hammerle.me",
     url="https://github.com/fphammerle/free-disk",
     license="MIT",
-    keywords=["disk", "files", "cleanup", "free", "delete", "old",],
+    keywords=[
+        "disk",
+        "files",
+        "cleanup",
+        "free",
+        "delete",
+        "old",
+    ],
     classifiers=[
         "Development Status :: 3 - Alpha",
         "Intended Audience :: System Administrators",
@@ -35,8 +42,12 @@ setuptools.setup(
         "Topic :: Utilities",
     ],
     packages=setuptools.find_packages(),
-    entry_points={"console_scripts": ["free-disk = free_disk:main",],},
+    entry_points={
+        "console_scripts": [
+            "free-disk = free_disk:main",
+        ],
+    },
     install_requires=[],
-    setup_requires=["setuptools_scm",],
-    tests_require=["pylint>=2.3.0", "pytest",],
+    setup_requires=["setuptools_scm"],
+    tests_require=["pytest"],
 )

tests/data_size_to_bytes_test.py

@@ -32,7 +32,7 @@ def test_data_size_to_bytes(data_size_with_unit, expected_bytes):
     assert expected_bytes == free_disk.data_size_to_bytes(data_size_with_unit)
 
 
-@pytest.mark.parametrize("data_size_with_unit", ["abcdef", "123G",])
+@pytest.mark.parametrize("data_size_with_unit", ["abcdef", "123G"])
 def test_data_size_to_bytes_fail(data_size_with_unit):
     with pytest.raises(ValueError):
         free_disk.data_size_to_bytes(data_size_with_unit)