Use NodeJS

.github/workflows/jest-tests.yml

@@ -9,6 +9,10 @@ jobs:
     runs-on: ubuntu-latest
     steps:
     - uses: actions/checkout@v2
+    - name: Use Node.js
+      uses: actions/setup-node@v1
+      with:
+        node-version: '12.x'
     - name: Install Code Climate test-reporter
       run: |
         curl -L https://codeclimate.com/downloads/test-reporter/test-reporter-latest-linux-amd64 > ./cc-test-reporter