include src in npm package

package.json

@@ -1,6 +1,6 @@
 {
   "name": "frappe-charts",
-  "version": "1.2.3",
+  "version": "1.3.0",
   "description": "https://frappe.github.io/charts",
   "main": "dist/frappe-charts.min.cjs.js",
   "module": "dist/frappe-charts.min.esm.js",
@@ -10,6 +10,7 @@
     "doc": "docs"
   },
   "files": [
+    "src",
     "dist"
   ],
   "scripts": {