feat: adds src folder published files

Author: itofarina

package.json

@@ -1,6 +1,6 @@
 {
   "name": "@rsksmart/rif-ui",
-  "version": "0.3.0",
+  "version": "0.3.1",
   "description": "Exposes common components to be re used in RIF projects",
   "keywords": [
     "RIF",
@@ -14,7 +14,8 @@
   "license": "MIT",
   "author": "rsksmart",
   "files": [
-    "dist"
+    "dist",
+    "src"
   ],
   "main": "dist/index.js",
   "module": "dist/index.modern.js",