Revert to Node 14

node-sass 4 doesn't handle Node 16. Could maybe update all of that stuff, but vuepress still seems to rely on Webpack 4?

.github/workflows/push.yml

@@ -17,7 +17,10 @@ jobs:
       - name: Setup Node.js
         uses: actions/setup-node@v2
         with:
-          node-version: 16
+          node-version: 14
+
+      - name: Setup NPM 7
+        run: npm install -g npm@7
 
       - name: Check cache
         uses: actions/cache@v2

package.json

@@ -41,14 +41,14 @@
 		"webpack": "^4.44.2"
 	},
 	"dependencies": {
-		"@mr-hope/vuepress-plugin-sitemap": "^1.15.2",
+		"@mr-hope/vuepress-plugin-sitemap": "^1.18.2",
 		"axios": "^0.21.1",
 		"core-js": "2.6.4",
-		"element-ui": "^2.15.1",
+		"element-ui": "^2.15.3",
 		"iso-639-1": "^2.1.9",
 		"lodash.groupby": "^4.6.0",
 		"lodash.sortby": "^4.7.0",
-		"marked": "^2.0.7",
+		"marked": "^2.1.3",
 		"material-design-icons-iconfont": "^6.1.0",
 		"vue": "^2.6.12",
 		"vue-agile": "^1.1.3",