Replace microbundle with rollup

Author: XhmikosR

.babelrc.js

@@ -0,0 +1,3 @@
+# https://github.com/browserslist/browserslist#readme
+
+defaults

.browserslistrc

@@ -16,7 +16,7 @@
   },
   {
     "path": "dist/quicklink.umd.js",
-    "limit": "2.55 kB",
+    "limit": "2.6 kB",
     "gzip": true
   }
 ]

.size-limit.json

@@ -126,6 +126,14 @@ module.exports = [
       ...jsdocRulesOff,
     },
   },
+  {
+    files: [
+      'rollup.config.mjs',
+    ],
+    languageOptions: {
+      sourceType: 'module',
+    },
+  },
   {
     files: [
       'site/src/assets/js/**',