Dropping Python 3.7 support, adding PyPy 3.9.

Author: TkTech

.github/workflows/test.yml

@@ -10,7 +10,7 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        python-version: [3.7, 3.8, 3.9, "3.10", "3.11", pypy3.7]
+        python-version: [3.8, 3.9, "3.10", "3.11", pypy3.9]
 
     steps:
     - uses: actions/checkout@v3

pyproject.toml

@@ -14,7 +14,6 @@ classifiers = [
     'Intended Audience :: Developers',
     'License :: OSI Approved :: BSD License',
     'Operating System :: OS Independent',
-    'Programming Language :: Python :: 3.7',
     'Programming Language :: Python :: 3.8',
     'Programming Language :: Python :: 3.9',
     'Programming Language :: Python :: 3.10',
@@ -31,7 +30,7 @@ include = [
 ]
 
 [tool.poetry.dependencies]
-python = "^3.7"
+python = "^3.8"
 pytz = ">=2022.7"
 Flask = ">=2.0"
 Babel = ">=2.12"