Update module gopkg.in/macaroon.v2 to v2.1.0

[renovate[bot]]

This PR contains the following updates:

Package	Type	Update	Change
gopkg.in/macaroon.v2	require	minor	v2.0.0 -> v2.1.0

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Release Notes

go-macaroon/macaroon

### [`v2.1.0`](https://togithub.com/go-macaroon/macaroon/compare/v2.0.0...v2.1.0) [Compare Source](https://togithub.com/go-macaroon/macaroon/compare/v2.0.0...v2.1.0)

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Renovate configuration

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

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[coveralls]

Pull Request Test Coverage Report for Build 659155373

• 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 81.789%

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Totals
Change from base Build 659153439:	0.0%
Covered Lines:	256
Relevant Lines:	313

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💛 - Coveralls