fix: ignore winston dep in webpack (#37)

src/reporters/winston.js

@@ -1,7 +1,8 @@
 // This reporter is compatible with Winston 3
 // https://github.com/winstonjs/winston
 
-const _require = require // bypass webpack
+// eslint-disable-next-line
+const _require = typeof __non_webpack_require__ !== 'undefined' ? __non_webpack_require__ : require // bypass webpack
 
 export default class WinstonReporter {
   constructor (logger) {