dependabot npm(deps-dev): bump supertest from 6.1.6 to 6.2.1

Bumps supertest from 6.1.6 to 6.2.1.

Release notes

Sourced from supertest's releases.

v6.2.1

• chore: bump deps 9a87305

https://github.com/visionmedia/supertest/compare/v6.2.0...v6.2.1

v6.2.0

• 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

https://github.com/visionmedia/supertest/compare/v6.1.6...v6.2.0

Commits

• bb856d2 v6.2.1
• 9a87305 chore: bump deps
• 0b03531 v6.2.0
• e741cab chore: bump deps
• 88dc262 Merge pull request #653 from torhovland/patch-1
• 70a3d00 Merge pull request #713 from jtomaszewski/patch-1
• a70c1a0 Merge pull request #749 from jimmywarting/misc
• aae4d8e var to const
• f17be2a add missing comma
• cdb0ad9 use explicit path
• Additional commits viewable in compare view