ci: simplify engine check

.github/workflows/ci.yml

@@ -14,21 +14,21 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - uses: actions/checkout@v2
-      - name: Use Node.js ${{ env.NODE_VERSION }}
+      - name: Use Node.js 12
         uses: actions/setup-node@v1
         with:
-          node-version: ${{ env.NODE_VERSION }}
+          node-version: 12
       - name: Cache Node.js modules
         uses: actions/cache@v2
         with:
           path: ~/.npm
-          key: ${{ runner.os }}-node-${{ env.NODE_VERSION }}-${{ hashFiles('**/package-lock.json') }}
+          key: ${{ runner.os }}-node-12-${{ hashFiles('**/package-lock.json') }}
           restore-keys: |
-            ${{ runner.os }}-node-${{ env.NODE_VERSION }}-
+            ${{ runner.os }}-node-12-
+      - name: Enforce strict engine version
+        run: echo "engine-strict=true" > .npmrc
       - name: Install dependencies
-        run: npm ci
-      - name: CI Node Engine Check
-        run: npm run ci:checkNodeEngine
+        run: npm install --ignore-scripts
   check-lint:
     name: Lint
     timeout-minutes: 15

package.json

@@ -97,7 +97,7 @@
     "cross-env": "7.0.2",
     "css-loader": "6.5.1",
     "eslint": "6.8.0",
-    "eslint-plugin-jest": "23.8.2",
+    "eslint-plugin-jest": "27.0.4",
     "eslint-plugin-react": "7.19.0",
     "http-server": "14.0.0",
     "jest": "24.8.0",