Add Python 3.7 as supported platform

Author: noirbizarre

.github/workflows/ci.yml

@@ -10,7 +10,7 @@ jobs:
     runs-on: ubuntu-latest
     strategy:
       matrix:
-        python-version: [3.8, 3.9, "3.10"]
+        python-version: [3.7, 3.8, 3.9, "3.10"]
         tox-version: [3, 4]
 
     steps:

tox.ini

@@ -5,15 +5,15 @@ ignore =
 max-line-length = 88
 
 [tox]
-envlist = py{38,39,310}-tox{3,4}, lint
+envlist = py3{7,8,9,10}-tox{3,4}, lint
 passenv = LD_PRELOAD
 isolated_build = True
 
 [testenv]
 groups = test
-deps = 
-    tox4: tox>=4.0.0b2
-commands = 
+commands_pre =
+    tox4: pip install tox>=4.0.0b2
+commands =
     tox --version
     test {posargs}