Update github workflow node version

Author: ryanluker

.github/workflows/publish.yml

@@ -11,7 +11,7 @@ jobs:
       - uses: actions/checkout@v2
       - uses: actions/setup-node@v1
         with:
-          node-version: 16
+          node-version: 18
       - run: npm ci && npm install
       - name: Publish to Open VSX Registry
         uses: HaaLeo/publish-vscode-extension@v0
@@ -23,7 +23,7 @@ jobs:
       - uses: actions/checkout@v2
       - uses: actions/setup-node@v1
         with:
-          node-version: 16
+          node-version: 18
       - run: npm ci && npm install
       - name: Publish to Visual Studio Marketplace
         uses: HaaLeo/publish-vscode-extension@v0

.github/workflows/test.yml

@@ -24,7 +24,7 @@ jobs:
     - uses: actions/checkout@v1
     - uses: actions/setup-node@v1
       with:
-        node-version: 16
+        node-version: 18
     - run: npm ci
     - run: npm run build
     - run: npm run ${{ matrix.test }}