Migrate to the new, non-preview API version

[ashemedai]

Describe the bug
The wiki in this repository mentions the use of "managementApiVersion": "2018-06-01-preview" a few times.

To Reproduce
Steps to reproduce the behavior:

1. Go to wiki
2. Click on self-hosting the portal
3. Scroll down to Step 2: Configure
4. See error

Expected behavior
Expected to see "managementApiVersion": "2019-01-01" as per visiting https://docs.microsoft.com/en-us/rest/api/apimanagement/ and folding open the Reference to see GA versions.

Portal environment
N/A

Release tag or commit SHA (if using self-hosted version)
N/A

API Management service name
N/A

Environment
N/A

[mikebudzynski]

@ashemedai Thanks for opening this issue. Migrating to the new API version is one our roadmap.

[ashemedai]

@mikebudzynski Awesome to hear. I did try the 2019-01-01 API calls yesterday to retrieve the various data of a portal I clicked together and it all worked as it should (which shouldn't be a surprise, but still nice to know hopefully). I might actually write a blog post about this.

As an aside: awesome work on the new portal.

[mikebudzynski]

Thanks, @ashemedai! Although the endpoint works, we still need to document the API here before we switch the versions.

[mikebudzynski]

Closed with #819