chore: bump @types/inquirer from 6.5.0 to 7.3.1 in /backend (#101)

Bumps [@types/inquirer](https://github.com/DefinitelyTyped/DefinitelyTyped/tree/HEAD/types/inquirer) from 6.5.0 to 7.3.1.
- [Release notes](https://github.com/DefinitelyTyped/DefinitelyTyped/releases)
- [Commits](https://github.com/DefinitelyTyped/DefinitelyTyped/commits/HEAD/types/inquirer)

Signed-off-by: dependabot-preview[bot] <support@dependabot.com>

Co-authored-by: dependabot-preview[bot] <27856297+dependabot-preview[bot]@users.noreply.github.com>

Author: dependabot-preview[bot]

backend/package.json

@@ -129,7 +129,7 @@
 	"devDependencies": {
 		"@types/chai": "^4.2.14",
 		"@types/fs-extra": "^9.0.4",
-		"@types/inquirer": "^6.5.0",
+		"@types/inquirer": "^7.3.1",
 		"@types/lodash": "^4.14.165",
 		"@types/mocha": "^8.2.1",
 		"@types/node": "^14.14.32",