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/intel-security/index.ts

@@ -40,7 +40,7 @@ export interface IntelSecurityDataOptions {
  * For more information please visit the [API documentation](https://software.intel.com/en-us/app-security-api/api).
  *
  * @usage
- * ```
+ * ```typescript
  * import { IntelSecurity } from '@ionic-native/intel-security';
  * ...
  * constructor(private intelSecurity: IntelSecurity) { }