feat/web view native request method headers

[wilcomx]

This PR contains

• Bug fix
• Feature
• Refactor
• Documentation
• Other (describe)

What is the purpose of this PR?

This PR request adds GET (default) and POST (with optional body) method verb selection and header pass-through to the request url of the native WebView. Since url's are limited in lenght, so is the amount of additional data to pass along the request through query parameters. For example JWT's or other authentication and authorization information.

Relevant changes

This feature has added three configuration items to the advanced section of the WebView widget configuration:

• GET and POST method verb selection.
• An optional dynamic Body string to pass along with POST requests.
• An optional object list with dynamic headerName and headerValue attributes.

All changes are backwards compitable and won't break the configurations of the previous version of the widget. On Android headers are only passed through GET requests. This is mentioned in the header description.

What should be covered while testing?

6 scenario's have been test on both Android and iOS:

• GET request (previous and default working)
• GET request with headers
• POST request
• POST request with body
• POST request with headers (only supported on iOS)
• POST request with body and headers (only supported on iOS)

Extra comments

Unit tests included and code coverage maintained. Applied formatting and lint.

[UrazAkgultan]

Looks good to me 👍 Thank you for your contribution.