Update codecov/codecov-action action to v3

[renovate[bot]]

This PR contains the following updates:

Package	Type	Update	Change
codecov/codecov-action	action	major	v1 -> v3

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Release Notes

codecov/codecov-action

### [`v3`](https://togithub.com/codecov/codecov-action/compare/v2...v3) [Compare Source](https://togithub.com/codecov/codecov-action/compare/v2...v3) ### [`v2`](https://togithub.com/codecov/codecov-action/compare/v1...v2) [Compare Source](https://togithub.com/codecov/codecov-action/compare/v1...v2)

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Configuration

📅 Schedule: Branch creation - At any time (no schedule defined), Automerge - At any time (no schedule defined).

🚦 Automerge: Disabled by config. Please merge this manually once you are satisfied.

♻ Rebasing: Whenever PR becomes conflicted, or you tick the rebase/retry checkbox.

🔕 Ignore: Close this PR and you won't be reminded about this update again.

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• [ ] If you want to rebase/retry this PR, check this box

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This PR has been generated by Mend Renovate. View repository job log here.

[codecov-commenter]

Codecov Report

Merging #39 (2f8a48d) into master (266c735) will not change coverage. The diff coverage is n/a.

@@           Coverage Diff           @@
##           master      #39   +/-   ##
=======================================
  Coverage   39.77%   39.77%           
=======================================
  Files          23       23           
  Lines        2632     2632           
=======================================
  Hits         1047     1047           
  Misses       1585     1585           

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