Raise minimum supported Python version to 3.8 (#481)

.github/workflows/tests.yml

@@ -16,7 +16,6 @@ jobs:
           - ubuntu
           - windows
         python-version:
-        - "3.7"
         - "3.8"
         - "3.9"
         - "3.10"

README.rst

@@ -108,7 +108,7 @@ should start with a slash, but not end with one; for example::
 Python Support
 --------------
 
-Daphne requires Python 3.7 or later.
+Daphne requires Python 3.8 or later.
 
 
 Contributing

setup.cfg

@@ -16,7 +16,6 @@ classifiers =
     Operating System :: OS Independent
     Programming Language :: Python
     Programming Language :: Python :: 3
-    Programming Language :: Python :: 3.7
     Programming Language :: Python :: 3.8
     Programming Language :: Python :: 3.9
     Programming Language :: Python :: 3.10
@@ -32,7 +31,7 @@ install_requires =
     asgiref>=3.5.2,<4
     autobahn>=22.4.2
     twisted[tls]>=22.4
-python_requires = >=3.7
+python_requires = >=3.8
 setup_requires =
     pytest-runner
 zip_safe = False

tox.ini

@@ -1,6 +1,6 @@
 [tox]
 envlist =
-    py{37,38,39,310,311}
+    py{38,39,310,311}
 
 [testenv]
 extras = tests