Update GH actions (#42)

Author: jarrodmillman

.github/workflows/coverage.yml

@@ -15,7 +15,7 @@ jobs:
     steps:
       - uses: actions/checkout@v3
       - name: Set up Python ${{ matrix.python-version }}
-        uses: actions/setup-python@v3
+        uses: actions/setup-python@v4
         with:
           python-version: ${{ matrix.python-version }}
 

.github/workflows/test.yml

@@ -8,7 +8,8 @@ jobs:
     strategy:
       matrix:
         os: [ubuntu, macos, windows]
-        python-version: ["3.7", "3.8", "3.9", "3.10", "3.11-dev"]
+        python-version:
+          ["3.7", "3.8", "3.9", "3.10", "3.11", "pypy-3.8", "pypy-3.9"]
 
     steps:
       - uses: actions/checkout@v3