add spec for "require"

[elenam]

The error on "require" is misleading:

utilities.spec_generator=> (require "nonsense")

Don't know how to create a sequence from a character.

Need to check what types are ok (note: this may be tricky!) and add a spec.
There is also this case:

utilities.spec_generator=> (require [])

No value found for key true. Every key for a hash-map must be followed by a value.

We may be able to approach it with spec, but need to be careful.

[elenam]

Similar functions: use, refer, import, refer-clojure.

[elenam]

Not sure what the story is in 1.10, need to look into it.

[stanislowskij]

This commit was transferred from the legacy repository as part of our Fall 2024 housekeeping effort. The issue has been removed from the legacy repository.

[stanislowskij]

Subsumed by #66