Error in the production environment
## Error Message (Executing)

```
SyntaxError: Cannot declare a let variable twice: 'e'..
Plugin “index”, line 1:
» function __skpm_run(key,context){that.context=context;var exports=function(e){function t(n){if(r[n])return r[n].exports;var i=r[n]={i:n,l:!1,exports:{}};return e[n].call(i.exports,i,i.exports,t),i.l=!0,i.exports}var r={};return t.m=e,t.c=r,t.d=function(e,r,n){t.o(e,r)||Object.defineProperty(e,r,{configurable:!1,enumerable:!0,get:n})},t.n=function(e){var r=e&&e.__esModule?function(){return e.default}:function(){return e};return t.d(r,"a",r),r},t.o=function(e,t){return Object.prototype.hasOwnProperty.call(e,t)},t.p="",t(t.s=150)}([function(e,t,r){"use strict";e.exports=r(53)},function(e,t,r){"use strict";function n(e){return e&&e.__esModule?e:{default:e}}var i=r(122),o=n(r(282)),a=n(r(31)),l=n(r(283)),u=n(r(284)),c=n(r(285)),s=n(r(144)),f=n(r(142)),d=n(r(286)),h=n(r(87)),p=n(r(143)),v=n(r(139)),g=r(58);e.exports={render:i.render,renderToJSON:i.renderToJSON,StyleSheet:a.default,Document:l.default,Page:u.default,Artboa<…>
```

## Command

```bash

$ NODE_ENV=production skpm-build

```

## Doubtful

Skpm own dependency 'uglify-es' has been locked version at v3.2.2
