Support preview of JSON:API's "application/vnd.api+json" Content-Type

[allthesignals]

Describe the bug
When I issue a GET request to an endpoint responding with the content type "application/vnd.api+json", I see a 200 success response, but the reponse field is blank (see screenshot).

When I click "copy response", and paste the value in a text editor, I see:

[object Object]

This leads me to believe that it isn't recognizing this particular content-type and doesn't know to parse it as JSON? Just a guess.

I've alluded to this in this issue: #634.

I believe other similar tools are able to recognize this.

To Reproduce
Steps to reproduce the behavior:

1. Make a request to a JSON API having a application/vnd.api+json Content-Type
2. Scroll down
3. Response body is blank but request is 200 okay.

Screenshots

Desktop (please complete the following information):

• OS: Catalina
• Browser Chrome
• Version v1.9.0

Additional context
Add any other context about the problem here.

[AndrewBastin]

Thanks for opening the issue!

We will get into fixing that right away!

[allthesignals]

You bet! I'm taking a look right now fwiw...