fix: resolve implementation for multiple contributors

[tenshiAMD]

What:

• resolve implementation for multiple contributors

Why:

• multiple contributors does not work properly

How:

• refactor and update implementation

Checklist:

• [x] Documentation
• [ ] Ready to be merged
• [x] Added myself to contributors table. Bot Usage

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[tenshiAMD]

TODO:

• [x] Add snapshot/s for testing multiple contributors in single comment
• [x] Add some documentation for usage

[codecov[bot]]

Codecov Report

Base: 100.00% // Head: 100.00% // No change to project coverage :thumbsup:

Coverage data is based on head (840a60a) compared to base (fb2d7c7). Patch coverage: 100.00% of modified lines in pull request are covered.

Additional details and impacted files

```diff @@ Coverage Diff @@ ## master #439 +/- ## ========================================= Coverage 100.00% 100.00% ========================================= Files 17 16 -1 Lines 485 451 -34 Branches 57 53 -4 ========================================= - Hits 485 451 -34 ``` | [Impacted Files](https://codecov.io/gh/all-contributors/app/pull/439?src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=all-contributors) | Coverage Δ | | |---|---|---| | [lib/parse-comment.js](https://codecov.io/gh/all-contributors/app/pull/439/diff?src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=all-contributors#diff-bGliL3BhcnNlLWNvbW1lbnQuanM=) | `100.00% <100.00%> (ø)` | | | [lib/process-issue-comment.js](https://codecov.io/gh/all-contributors/app/pull/439/diff?src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=all-contributors#diff-bGliL3Byb2Nlc3MtaXNzdWUtY29tbWVudC5qcw==) | `100.00% <100.00%> (ø)` | | Help us with your feedback. Take ten seconds to tell us [how you rate us](https://about.codecov.io/nps?utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=all-contributors). Have a feature suggestion? [Share it here.](https://app.codecov.io/gh/feedback/?utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=all-contributors)

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[github-actions[bot]]

:tada: This PR is included in version 1.18.2 :tada:

The release is available on GitHub release

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