Drop Python 3.7 support (end of lifed).

setup.py

@@ -20,9 +20,15 @@ setup(
         "Topic :: Text Processing :: Markup",
     ],
     packages=find_packages(exclude=["tests*"]),
-    entry_points={"console_scripts": ["novel-stats = novel_stats.novel_stats:main",]},
+    entry_points={
+        "console_scripts": [
+            "novel-stats = novel_stats.novel_stats:main",
+        ]
+    },
     install_requires=(),
-    extras_require={"multi_file": ["MarkdownPP"],},
+    extras_require={
+        "multi_file": ["MarkdownPP"],
+    },
     include_package_data=True,
     python_requires='>3.7.0',
 )

test_requirements.txt

@@ -1,18 +1,18 @@
-appdirs==1.4.4; python_version >= '3.8'
-attrs==23.1.0; python_version >= '3.8'
-black==23.10.1; python_version >= '3.8'
-click==8.1.7; python_version >= '3.8'
+appdirs==1.4.4
+attrs==23.1.0
+black==23.10.1
+click==8.1.7
 coverage==7.3.2
 flake8==6.1.0
 flexmock==0.11.3
 isort==5.12.0
 mccabe==0.7.0
 pluggy==1.3.0
-pathspec==0.11.2; python_version >= '3.8'
+pathspec==0.11.2
 py==1.11.0
 pycodestyle==2.11.1
 pyflakes==3.1.0
 pytest==7.4.2
 pytest-cov==4.1.0
-regex; python_version >= '3.8'
-typed-ast; python_version >= '3.8'
+regex
+typed-ast

tox.ini

@@ -1,5 +1,5 @@
 [tox]
-env_list = py37,py38,py39,py310,py311
+env_list = py38,py39,py310,py311
 skip_missing_interpreters = True
 package = editable
 minversion = 4.0
@@ -10,7 +10,7 @@ deps =
 pass_env = COVERAGE_FILE
 commands =
     pytest {posargs}
-    py38,py39: black --check .
+    black --check .
     isort --check-only --settings-path setup.cfg .
     flake8 novel_stats tests