chore(deps): pin dependencies

[renovate]

This PR contains the following updates:

Package	Type	Update	Change	References
express	devDependencies	pin	^4.16.3 -> 4.16.3	homepage, source
mocha	devDependencies	pin	^6.0.0 -> 6.0.0	homepage, source
request	devDependencies	pin	^2.87.0 -> 2.87.0	source
supertest	devDependencies	pin	^4.0.0 -> 4.0.0	source

📌 Important: Renovate will wait until you have merged this Pin PR before creating any upgrade PRs for the affected packages. Add the preset :preserveSemverRanges your config if you instead don't wish to pin dependencies.

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