Net50

[TheAngryByrd]

Proposed Changes

Updates MiniScaffold to use net5.0 as the default.

• Drops support for full framework
• Cleans up tests templates
• Updates FSharp to 5.0
• Updates Expecto to 9.x
• Updates Altcover to 7.x

Leaving this as draft until FAKE releases a full version and not an alpha.

Closes #169 #220

Types of changes

What types of changes does your code introduce to MiniScaffold?
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• Breaking change (fix or feature that would cause existing functionality to not work as expected)

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
• I have added tests that prove my fix is effective or that my feature works (if appropriate)
• I have added necessary documentation (if appropriate)

Further comments

If this is a relatively large or complex change, kick off the discussion by explaining why you chose the solution you did and what alternatives you considered, etc...