update actions versions

Author: TomDonoghue

.github/workflows/build.yml

@@ -19,9 +19,9 @@ jobs:
         python-version: [3.6, 3.7, 3.8, 3.9, "3.10"]
 
     steps:
-    - uses: actions/checkout@v2
+    - uses: actions/checkout@v3
     - name: Set up Python ${{ matrix.python-version }}
-      uses: actions/setup-python@v2
+      uses: actions/setup-python@v4
       with:
         python-version: ${{ matrix.python-version }}
     - name: Install dependencies
@@ -38,4 +38,4 @@ jobs:
       run: |
         pytest --doctest-modules --ignore=$MODULE_NAME/tests $MODULE_NAME
     - name: Upload coverage to Codecov
-      uses: codecov/codecov-action@v1
+      uses: codecov/codecov-action@v3