fix: replace unmaintained dependency request for axios (merge from upstream)

[vwong]

Since we forked, there's only one commit onto master, which is https://bitbucket.org/atlassian/swagger-mock-validator/commits/9fcd448f12653598ecc9181191b0c1f966e08e6a

Pulling this in, to satisfy https://avd.aquasec.com/nvd/2023/cve-2023-28155/