chore: add filesize plugin for rollup

Author: xiaoluoboding

package-lock.json

@@ -52,6 +52,7 @@
     "normalize.css": "^8.0.1",
     "rollup-plugin-babel": "^4.3.3",
     "rollup-plugin-commonjs": "^10.1.0",
+    "rollup-plugin-filesize": "^6.2.1",
     "rollup-plugin-json": "^4.0.0",
     "rollup-plugin-node-resolve": "^5.2.0",
     "rollup-plugin-terser": "^5.1.2",

package.json

@@ -1,5 +1,6 @@
-import cjs from 'rollup-plugin-commonjs'
 import babel from 'rollup-plugin-babel'
+import cjs from 'rollup-plugin-commonjs'
+import filesize from 'rollup-plugin-filesize'
 import json from 'rollup-plugin-json'
 import node from 'rollup-plugin-node-resolve'
 import vue from 'rollup-plugin-vue'
@@ -17,6 +18,7 @@ const plugins = [
   cjs({
     sourceMap: false
   }),
+  filesize(),
   json(),
   node(),
   vue()