chore(deps): update dependency @types/supertest to v2.0.15

[renovate[bot]]

This PR contains the following updates:

Package	Change	Age	Adoption	Passing	Confidence
@types/supertest (source)	2.0.14 -> 2.0.15

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Configuration

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🚦 Automerge: Enabled.

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[coveralls]

Pull Request Test Coverage Report for Build 6609506805

• 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 74.775%

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Totals
Change from base Build 6609504761:	0.0%
Covered Lines:	94
Relevant Lines:	105

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💛 - Coveralls