Update module github.com/r3labs/diff/v2 to v2.13.0

[renovate[bot]]

This PR contains the following updates:

Package	Type	Update	Change
github.com/r3labs/diff/v2	require	minor	v2.12.0 -> v2.13.0

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Release Notes

r3labs/diff

### [`v2.13.0`](https://togithub.com/r3labs/diff/compare/v2.12.0...v2.13.0) [Compare Source](https://togithub.com/r3labs/diff/compare/v2.12.0...v2.13.0)

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Configuration

:date: Schedule: At any time (no schedule defined).

:vertical_traffic_light: Automerge: Enabled.

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

:no_bell: 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 WhiteSource Renovate. View repository job log here.

[coveralls]

Pull Request Test Coverage Report for Build 763994325

• 0 of 0 changed or added relevant lines in 0 files are covered.
• No unchanged relevant lines lost coverage.
• Overall coverage remained the same at 86.594%

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Totals
Change from base Build 737345244:	0.0%
Covered Lines:	239
Relevant Lines:	276

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💛 - Coveralls