Update dependency supertest to v6 - autoclosed

[renovate]

This PR contains the following updates:

Package	Change	Age	Adoption	Passing	Confidence
supertest	^4.0.2 -> ^6.0.0

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Release Notes

visionmedia/supertest

v6.2.2

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• chore: bump deps 8f4dd1e

v6.2.1

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• chore: bump deps 9a87305

v6.2.0

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• chore: bump deps e741cab
• Merge pull request #​653 from torhovland/patch-1 88dc262
• Merge pull request #​713 from jtomaszewski/patch-1 70a3d00
• Merge pull request #​749 from jimmywarting/misc a70c1a0
• var to const aae4d8e
• add missing comma f17be2a
• use explicit path cdb0ad9
• only use require in the top of the file 19dcd1e
• don't mixup superagent.Response \w fetch.Response 1dc25a1
• user super and arrow fn d2d9616
• move exports to the bottom 17cf193
• more const a0a5d57
• Merge pull request #​748 from jimmywarting/var 1d70492
• destruct assert dc60d5d
• refactor: convert var to const / let 03f0084
• Merge pull request #​747 from jimmywarting/classify afecc3f
• refactor: Convert test to a class d94ffbc
• Update README.md ad699ed
• docs: Add async/await example to README fc269b6
• Add missing require. 3537e4e

v6.1.6

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• Merge pull request #​735 from benjosantony/master 28116f9
• Add on to the mitigation in https://github.com/visionmedia/supertest/pull/728/commits to support empty array response body ed0f68d

v6.1.5

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• Merge pull request #​728 from swantzter/fix/array-of-statuses-body 3c46dae
• Mitigate array-of-statuses' impact on JSON bodies 5a6999a

v6.1.4

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• Merge pull request #​715 from juanvillegas/feature/allows-expect-to-take-an-array 7e4645c
• Allows expect to accept an array of statuses ab252f3

v6.1.3

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• Merge pull request #​705 from janthoe/master 8b0bf4d
• fix: Check error object before updating stack. (Fixes #​700) b628d34

v6.1.2

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• Merge pull request #​704 from ktutnik/fix-array-flat-issue 967aff1
• fix: Fix unappropriate stack trace issue on Node.js prior than 14 0a06ef1

v6.1.1

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• Merge pull request #​699 from jpbochi/new-stack-trace 6f3928f
• produces edited stack that starts with error name 0288826

v6.1.0

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• chore: bump deps a292f61
• Merge pull request #​678 from pitpit/bugfix/tests f133efb
• Merge pull request #​679 from julienw/do-not-exact-pin-versions a676437
• Merge pull request #​684 from dineshks1/master ac23355
• Merge pull request #​664 from DominusKelvin/patch-1 77a86ed
• Merge pull request #​690 from jpbochi/new-stack-trace 4b1fd0c
• Merge pull request #​698 from jackton1/patch-1 9b0751c
• Fix inconsistent return 848962e
• Wraps assert functions, updating stack trace of generated errors d41d10b
• Adds travis jobs on ppc64le aec2239
• Do not exact-pin the dependencies versions (Fixes #​677) 616dfb6
• fix 'ssl certificate key too small' error in test 45dcf6e
• docs: update README.md promise usage example ebd4c29

v6.0.1

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• Merge pull request #​682 from vukanac/master a4c4596
• Removes space in front of backticks for code blocks in README.md f635fce

v6.0.0

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• Merge pull request #​515 from holidaycheck/set-host-header-instead-of-adapting-url 7114571
• Set host header instead of host in url de056d2

v5.0.0

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• Merge pull request #​673 from visionmedia/v5.0.0-1 59d4e08
• Merge pull request #​671 from galuszkak/feature/upgrade-packages f503048

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