Update dependency supertest to v3.1.0

[mend-for-github-com[bot]]

This PR contains the following updates:

Package	Type	Update	Change
supertest	devDependencies	minor	3.0.0 -> 3.1.0

By merging this PR, the below issues will be automatically resolved and closed:

Severity	CVSS Score	CVE	GitHub Issue
Medium	5.3	CVE-2022-25901	#312

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Release Notes

ladjs/supertest (supertest)

### [`v3.1.0`](https://redirect.github.com/ladjs/supertest/releases/tag/v3.1.0) [Compare Source](https://redirect.github.com/ladjs/supertest/compare/v3.0.0...v3.1.0) - [#​473](https://redirect.github.com/ladjs/supertest/issues/473) - Remove unused dependency in Readme (thanks [@​pedro-otero](https://redirect.github.com/pedro-otero)) - [#​472](https://redirect.github.com/ladjs/supertest/issues/472) - Update travis node versions (thanks [@​rimiti](https://redirect.github.com/rimiti)) - [#​470](https://redirect.github.com/ladjs/supertest/issues/470) - Upgrade the superagent node module to resolve security vulnerabilities & fix the **proto** property deprecation (thanks [@​levioza](https://redirect.github.com/levioza)) - [#​446](https://redirect.github.com/ladjs/supertest/issues/446) - Fix bug, always pass on errors if no response (thanks [@​bkeepers](https://redirect.github.com/bkeepers)) - [#​418](https://redirect.github.com/ladjs/supertest/issues/418) - Add post() examples to the README (thanks [@​kevinburke](https://redirect.github.com/kevinburke)) - [#​297](https://redirect.github.com/ladjs/supertest/issues/297) - Add a .host() method to set a host other than 127.0.0.1 (thanks [@​mikec](https://redirect.github.com/mikec)) - [#​275](https://redirect.github.com/ladjs/supertest/issues/275) - Removed ambiguously misappropriated cultural references from readme (thanks [@​reallistic](https://redirect.github.com/reallistic))

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