[v5] Fantomas Updates

[1eyewonder]

Proposed Changes

1. Update fantomas to the latest version

2. Add Main.fs files from tests to .fantomasignore. The below code is causing errors with fantomas and thus not being caught. This also prevented us from catching code that needed formatting.

   #if !FABLE_COMPILER
   open Expecto
   
   [<Tests>] //needed for `dotnet test` to work
   #endif
   let allTests = testList "All Tests" [ AsyncSeq.allTests ]

3. build.fs has been updated to fail on uncaught code formatting errors within the else block.

Types of changes

What types of changes does your code introduce to FsToolkit.ErrorHandling?
Put an x in the boxes that apply and remove ones that don't apply

• Bugfix (non-breaking change which fixes an issue)

Checklist

Put an x in the boxes that apply. You can also fill these out after creating the PR. If you're unsure about any of them, don't hesitate to ask. We're here to help! This is simply a reminder of what we are going to look for before merging your code.

• Build and tests pass locally

Further Comments

I made it so that the checkFormatCode step fails if we encounter severe errors within Fantomas, however, I can also see why we may not want to fail here as well. I'm open to reverting/updating the build.fs as needed.

[1eyewonder]

Issue created in the Fantomas repo here

[1eyewonder]

After discussion on the issue thread above, I will make some quick updates later, so the code is not choking up fantomas