Fix package files

Author: yuanchuan

package-lock.json

@@ -1,6 +1,6 @@
 {
   "name": "@css-doodle/cli",
-  "version": "1.3.0",
+  "version": "1.3.1",
   "description": "A command-line tool for css-doodle to preview and generate images",
   "bin": {
     "css-doodle": "bin/index.js",
@@ -22,7 +22,7 @@
   ],
   "files": [
     "bin",
-    "src"
+    "lib"
   ],
   "author": "yuanchuan",
   "license": "MIT",