Further attempts to avoid github actions problem

Author: robdobsn

.github/workflows/deploy-gh-pages.yml

@@ -20,7 +20,7 @@ jobs:
     - uses: actions/checkout@v2
     - uses: actions/setup-node@v2
       with:
-        node-version: '14'
+        node-version: '16'
         cache: 'npm'
     - run: npm install
     - run: npm run docs

.github/workflows/lint-and-test.yml

@@ -8,7 +8,7 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        nodejs: [10, 12, 14]
+        nodejs: [10, 12, 14, 16]
 
     steps:
     - uses: actions/checkout@v2

.github/workflows/release-package.yml

@@ -11,7 +11,7 @@ jobs:
       - uses: actions/checkout@v2
       - uses: actions/setup-node@v2
         with:
-          node-version: 14
+          node-version: 16
       - run: npm ci
       - run: npm test