Update Babel to v8 (#15157)

Co-authored-by: fisker <lionkay@gmail.com>

.github/workflows/prod-test.yml

@@ -123,11 +123,21 @@ jobs:
           path: dist
 
       - name: Run Tests
+        if: matrix.node != '14'
         run: yarn test:production
 
+      - name: Run Tests (Node.js 14)
+        if: matrix.node == '14'
+        run: yarn test:production-node14
+
       - name: Run Format Tests (standalone)
+        if: matrix.node != '14'
         run: yarn test:production-standalone
 
+      - name: Run Format Tests (standalone, Node.js 14)
+        if: matrix.node == '14'
+        run: yarn test:production-standalone-node14
+
   cli:
     name: CLI
     runs-on: ubuntu-latest