ci: use newest node lts version

Author: Lehoczky

Diff for: .github/workflows/docs.yml

@@ -16,7 +16,7 @@ jobs:
 
       - uses: actions/setup-node@v3
         with:
-          node-version: 16
+          node-version: 18
           cache: yarn
 
       - name: Install dependencies

Diff for: .github/workflows/main.yml

@@ -14,7 +14,7 @@ jobs:
       - uses: actions/checkout@master
       - uses: actions/setup-node@v3
         with:
-          node-version: 14.x
+          node-version: 18
           cache: yarn
       - name: Lint and test
         run: |