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/stripe/index.ts

@@ -85,7 +85,7 @@ export interface StripeBankAccountParams {
  * A plugin that allows you to use Stripe's Native SDKs for Android and iOS.
  *
  * @usage
- * ```
+ * ```typescript
  * import { Stripe } from '@ionic-native/stripe';
  *
  * constructor(private stripe: Stripe) { }