ci: 更新node版本至14.x

.github/workflows/build.yml

@@ -19,7 +19,7 @@ jobs:
     - name: Set up Node
       uses: actions/setup-node@v1
       with:
-        node-version: 13.x
+        node-version: 14.x
     - name: Create .npmrc
       run: 'echo "//registry.npmjs.org/:_authToken=${{secrets.NPM_TOKEN}}" > .npmrc'
     - name: Install