docs(Configuration): Update TypeScript configuration example to TS 2.7 (#1926)

The updated snippet uses the same syntax as in any ES6/ES2015 based
module imports in vanilla JavaScript thanks to new features from
TypeScript 2.7 or newer
The relevant not has been added to the sample to mention these new
configuration compiler properties.

Thanks!

Author: peterblazejewicz

src/content/configuration/configuration-languages.md

@@ -26,8 +26,8 @@ and then proceed to write your configuration:
 __webpack.config.ts__
 
 ```typescript
-import * as webpack from 'webpack';
-import * as path from 'path';
+import path from 'path';
+import webpack from 'webpack';
 
 const config: webpack.Configuration = {
   entry: './foo.js',
@@ -40,6 +40,8 @@ const config: webpack.Configuration = {
 export default config;
 ```
 
+Above sample assumes version >= 2.7 or newer of TypeScript is used with the new `esModuleInterop` and `allowSyntheticDefaultImports` compiler options in your `tsconfig.json` file.
+
 Note that you'll also need to check your `tsconfig.json` file. If the module in `compilerOptions` in `tsconfig.json` is `commonjs`, the setting is complete, else webpack will fail with an error. This occurs because `ts-node` does not support any module syntax other than `commonjs`.
 
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