Update node version to 16 to fix CI

Author: Luni-4

.github/workflows/ci.yml

@@ -14,7 +14,7 @@ jobs:
       - uses: actions/checkout@v2
       - uses: actions/setup-node@v2
         with:
-          node-version: 14
+          node-version: 16
       - run: npm install
       - run: npm test
   test_windows:
@@ -23,6 +23,6 @@ jobs:
       - uses: actions/checkout@v2
       - uses: actions/setup-node@v2
         with:
-          node-version: 14
+          node-version: 16
       - run: npm install
       - run: npm run-script test-windows