build: add minify for js

Author: Scrum

package-lock.json

@@ -56,6 +56,7 @@
     "babel-eslint": "^10.0.2",
     "babel-loader": "^8.0.6",
     "babel-plugin-add-module-exports": "^1.0.2",
+    "babel-preset-minify": "^0.5.0",
     "babel-upgrade": "^1.0.1",
     "clinton": "^0.14.0",
     "conventional-changelog-cli": "^2.0.21",
@@ -133,6 +134,13 @@
                 "node": "4"
               }
             }
+          ],
+          [
+            "minify",
+            {
+              "removeUndefined": false,
+              "mangle": false
+            }
           ]
         ],
         "plugins": [