Bump LanguageExt.Sys from 4.4.3 to 4.4.8

[dependabot[bot]]

Bumps LanguageExt.Sys from 4.4.3 to 4.4.8.

Release notes

Sourced from LanguageExt.Sys's releases.

Big fixes and minor improvements release

New:

• Support for IfFail in Try, TryOption, TryAsync, and TryOptionAsync - Thanks @​mark-pro 👍
• Update prelude for Arithmetic typeclass - Thanks @​benjstephenson 👍
• Improvements to the Effects samples

Bug fixes:

• Fix for EitherUnsafe MapLeft throws ResultIsNullException
• Fix for Stack overflow with MapT on T
• Fix for CancellationTokenSource not disposed

Rollback to netstandard2.0 and CodeGeneration.Roslyn 0.6.1

Unfortunately, the previous release with the latest CodeGeneration.Roslyn build caused problems due to possible bugs in the CodeGeneration.Roslyn plugin system. These issues only manifested in the nuget package version of the LanguageExt.CodeGen and not in my project-to-project tests, giving a false sense of security.

After a lot of head-scratching, and attempts at making it work, it seems right to roll it back.

This also means rolling back to netstandard2.0 so that the old code-gen can work. And so, I have had to also remove the support for IAsyncEnumerable with OptionAsync and EitherAsync until this is resolved.

Apologies for anyone who wasted time on the last release and who might be inconvenienced by the removal of IAsyncEnumerable support. I tried so many different approaches and none seemed to be working.

Issues resolved:

• HEADS UP: New code-gen issue
• Set Equals

Improvements:

• Performance improvements for Map and Lst
• Performance improvements for all hashing of collections

Any further issues, please feel free to shout on the issues page or gitter.

Commits

• See full diff in compare view

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[fw2568]

@dependabot ignore this dependency

[dependabot[bot]]

OK, I won't notify you about LanguageExt.Sys again, unless you re-open this PR.