(actions) use node 16 (#332)

Author: MatthijsBurgh

.github/workflows/deployment.yml

@@ -14,7 +14,7 @@ jobs:
       - uses: actions/checkout@v2
       - uses: actions/setup-node@v2
         with:
-          node-version: 14
+          node-version: 16
       - uses: actions/cache@v2
         with:
           path: ~/.npm

.github/workflows/main.yml

@@ -10,7 +10,7 @@ jobs:
       - uses: actions/checkout@v2
       - uses: actions/setup-node@v2
         with:
-          node-version: 14
+          node-version: 16
       - uses: actions/cache@v2
         with:
           path: ~/.npm