Fix mocks, update doc comments

[sz-piotr]

Resolves L2B-1123, L2B-1220, L2B-1219, L2B-1218 Closes #201

[changeset-bot[bot]]

🦋 Changeset detected

Latest commit: 774e30367a87120c6091593a5eb456c98a1dac81

The changes in this PR will be included in the next version bump.

This PR includes changesets to release 2 packages

| Name | Type | | ------- | ----- | | earljs | Minor | | website | Patch |

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Name	Status	Preview	Updated
earl-docs	✅ Ready (Inspect)	Visit Preview	Mar 22, 2023 at 0:38AM (UTC)

[linear[bot]]

L2B-1123 Improve mocks error message when it is not configured for some parameters

[https://github.com/l2beat/earl/issues/201](https://github.com/l2beat/earl/issues/201)

L2B-1220 Rename mock to mockObject and add doc comment to it

L2B-1219 Test return value ordering for `mockFn`

L2B-1218 Add doc comments for `mockFn`