perf: add size-limit

Author: jorisre

.github/workflows/size.yml

@@ -0,0 +1,12 @@
+name: size
+on: [pull_request]
+jobs:
+  size:
+    runs-on: ubuntu-latest
+    env:
+      CI_JOB_NUMBER: 1
+    steps:
+      - uses: actions/checkout@v1
+      - uses: andresz1/size-limit-action@v1
+        with:
+          github_token: ${{ secrets.GITHUB_TOKEN }}

package.json

@@ -18,6 +18,20 @@
   "publishConfig": {
     "access": "public"
   },
+  "size-limit": [
+    {
+      "path": "dist/index.js",
+      "limit": "264 B"
+    },
+    {
+      "path": "dist/index.esm.js",
+      "limit": "288 B"
+    },
+    {
+      "path": "dist/index.umd.js",
+      "limit": "270 B"
+    }
+  ],
   "scripts": {
     "clean": "rimraf dist",
     "prebuild": "npm run clean",