Merge pull request #59 from mitodl/jkachel/bump-ci-runner-node-version

Bump CI workflow to use 16.20.2

Author: jkachel

.github/workflows/ci.yml

@@ -9,7 +9,7 @@ jobs:
       - name: Set up NodeJS
         uses: actions/setup-node@v2-beta
         with:
-          node-version: 15.3.0
+          node-version: 16.20.2
 
       - name: Get yarn cache directory path
         id: yarn-cache-dir-path