Card collection updates

[emeaguiar]

Summary

Fixes #61

Checklist

• My pull request is addressing an open issue (please create one otherwise).
• My code is tested and passes existing tests.
• My code follows the Contributing Guidelines (updates are often made to the guidelines, check it out periodically).

[coveralls]

Pull Request Test Coverage Report for Build 1270631234

Warning: This coverage report may be inaccurate.

This pull request's base commit is no longer the HEAD commit of its target branch. This means it includes changes from outside the original pull request, including, potentially, unrelated coverage changes.

• For more information on this, see Tracking coverage changes with pull request builds.
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• For a quick fix, rebase this PR at GitHub. Your next report should be accurate.

Details

• 4 of 7 (57.14%) changed or added relevant lines in 3 files are covered.
• No unchanged relevant lines lost coverage.
• Overall coverage increased (+1.4%) to 79.594%

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Changes Missing Coverage	Covered Lines	Changed/Added Lines	%
plugin/assets/src/block-editor/blocks/cards-collection/deprecated.js	2	3	66.67%
plugin/assets/src/block-editor/blocks/cards-collection/edit.js	0	2	0.0%

Totals
Change from base Build 1246737788:	1.4%
Covered Lines:	4586
Relevant Lines:	5601

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💛 - Coveralls

[PatelUtkarsh]

Nice work! @emeaguiar Left one suggestion.

[PatelUtkarsh]

Instead of filled, Should we say elevated as per material specs? https://material.io/components/cards

[PatelUtkarsh]

✅