Update README.md

Author: liady

README.md

@@ -42,7 +42,7 @@ An array for the `externals` to whitelist, so they **will** be included in the b
 
 #### `options.importType (='commonjs')`
 The method in which unbundled modules will be required in the code. Best to leave as `commonjs` for node modules.
-May be one of [documented options](https://webpack.js.org/configuration/externals/#externals) or function `callback(moduleName)` which returns custom code to be returned as import type, eg.:
+May be one of [documented options](https://webpack.js.org/configuration/externals/#externals) or function `callback(moduleName)` which returns custom code to be returned as import type, e.g:
 ```js
 options.importType = function (moduleName) {
     return 'amd ' + moduleName;