update github actions

Author: Joseph Hamman

.github/workflows/main.yaml

@@ -13,19 +13,19 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - uses: actions/[email protected]
-      - uses: actions/[email protected].1
-      - uses: pre-commit/[email protected].0
+      - uses: actions/[email protected].2
+      - uses: pre-commit/[email protected].3
 
   test:
     name: ${{ matrix.python-version }}-build
     runs-on: ubuntu-latest
     strategy:
       matrix:
-        python-version: [3.7, 3.8]
+        python-version: [3.7, 3.8, 3.9]
     steps:
       - uses: actions/[email protected]
       - name: Setup Python
-        uses: actions/[email protected].1
+        uses: actions/[email protected].2
         with:
           python-version: ${{ matrix.python-version }}
           architecture: x64
@@ -54,11 +54,11 @@ jobs:
     runs-on: ubuntu-latest
     strategy:
       matrix:
-        python-version: [3.7, 3.8]
+        python-version: [3.8, 3.9]
     steps:
       - uses: actions/[email protected]
       - name: Setup Python
-        uses: actions/[email protected].1
+        uses: actions/[email protected].2
         with:
           python-version: ${{ matrix.python-version }}
           architecture: x64