Migrated `ListField` tests to @testing-library/react

[piotrpospiech]

Is part of https://github.com/vazco/uniforms/issues/1130

• added new tests to ListField RTL tests
• removed enzyme ListField tests

[codecov[bot]]

Codecov Report

All modified and coverable lines are covered by tests :white_check_mark:

Comparison is base (1a6ca83) 94.66% compared to head (02b44d1) 94.66%.

Additional details and impacted files

```diff @@ Coverage Diff @@ ## master #1299 +/- ## ======================================= Coverage 94.66% 94.66% ======================================= Files 231 231 Lines 3821 3821 Branches 1029 1029 ======================================= Hits 3617 3617 Misses 82 82 Partials 122 122 ```

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