Update dependencies

[TheAngryByrd]

Proposed Changes

Updates dependencies that don't break the build.

For some reason when updating dotnet-mono or FSharp.Core, Windows builds fail on dotnet test saying:

Test run for C:\Users\appveyor\AppData\Local\Temp\1\0a120276395f48959749c98941a2bc4b\MyCoolLib\tests\MyCoolLib.Tests\bin\Debug\net461\MyCoolLib.Tests.exe(.NETFramework,Version=v4.6.1)
Microsoft (R) Test Execution Command Line Tool Version 15.9.0
Copyright (c) Microsoft Corporation.  All rights reserved.
Starting test execution, please wait...
No test is available in C:\Users\appveyor\AppData\Local\Temp\1\0a120276395f48959749c98941a2bc4b\MyCoolLib\tests\MyCoolLib.Tests\bin\Debug\net461\MyCoolLib.Tests.exe. Make sure that test discoverer & executors are registered and platform & framework version settings are appropriate and try again.

Types of changes

What types of changes does your code introduce to MiniScaffold?
Put an x in the boxes that apply

• Bugfix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• 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...