Add the ability to choose ignore certain headers

[byshy]

Use case

When working with Postman, having content-length header sometimes causes the API call to fail since Postman adds data to the call that get clipped due to the preset length. Having to remember to remove it every time is tedious and causes inconvenience.

Solution #8

Add a nullable list of strings that are passed by the dev that will be used to ignore the headers inside