Bump CI Node version from 14 to 18

Author: gjsjohnmurray

.github/workflows/main.yml

@@ -50,7 +50,7 @@ jobs:
       - name: Use Node.js
         uses: actions/setup-node@v1
         with:
-          node-version: 14.x
+          node-version: 18.x
       - run: npm install
       - name: lint
         if: runner.os == 'Linux'
@@ -135,7 +135,7 @@ jobs:
       - name: Use Node.js
         uses: actions/setup-node@v1
         with:
-          node-version: 14.x
+          node-version: 18.x
       - name: Prepare build
         id: set-version
         run: |