Update Python versions

Author: hancush

.github/workflows/package.yml

@@ -27,7 +27,7 @@ jobs:
           - 5432:5432
     strategy:
       matrix:
-        python-version: ['3.6', '3.7', '3.8']
+        python-version: ['3.8', '3.9', '3.10']
         django-series: ['2.2', '3.0']
     steps:
     - uses: actions/checkout@v2

setup.py

@@ -43,10 +43,9 @@
                    "License :: OSI Approved :: BSD License",
                    "Natural Language :: English",
                    "Operating System :: OS Independent",
-                   "Programming Language :: Python :: 3.5",
-                   "Programming Language :: Python :: 3.6",
-                   "Programming Language :: Python :: 3.7",
                    "Programming Language :: Python :: 3.8",
+                   "Programming Language :: Python :: 3.9",
+                   "Programming Language :: Python :: 3.10",
                    "Topic :: Software Development :: Libraries :: Python Modules",
                    ],
       )