style(): unify docs and spacing (#1448)

* typo(barcode-scanner): fixe circle lint error

* typo(docs):  Unified the documentations

In some plugins the typescript markup was missing.
I also unified the console.log string from console.log("hello") to console.log('Hello') so any plugin page look the same.

src/@ionic-native/plugins/safari-view-controller/index.ts

@@ -16,7 +16,7 @@ export interface SafariViewControllerOptions {
  * @name Safari View Controller
  * @description
  * @usage
- * ```
+ * ```typescript
  * import { SafariViewController } from '@ionic-native/safari-view-controller';
  *
  * constructor(private safariViewController: SafariViewController) { }