Meta tweaks

Author: sindresorhus

.github/workflows/main.yml

@@ -18,8 +18,8 @@ jobs:
           - 16
           - 14
     steps:
-      - uses: actions/checkout@v3
-      - uses: actions/setup-node@v3
+      - uses: actions/checkout@v4
+      - uses: actions/setup-node@v4
         with:
           node-version: ${{ matrix.node-version }}
       - run: npm install --ignore-scripts

package.json

@@ -13,6 +13,7 @@
 		"email": "sindresorhus@gmail.com",
 		"url": "https://sindresorhus.com"
 	},
+	"sideEffects": false,
 	"engines": {
 		"node": ">=14"
 	},