Code Cleanup: Remove all usages of `dynamic`

[TylerLeonhardt]

Let's remove all the usages of dynamic so we don't have to depend on the Microsoft.CSharp nuget package. dynamic is very "against the typical rules" anyway.

[abc516]

@TylerLeonhardt is this still open? I'd be happy to take it on :)

[rjmholt]

@abc516 definitely still open 🙂

[Faro1991]

Also asking if this is still something you want people to work on. I'd be glad to assist :)

[andyleejordan]

Sure!