Update dependency swagger-spec-validator to v3.0.4

[renovate[bot]]

This PR contains the following updates:

Package	Change	Age	Adoption	Passing	Confidence
swagger-spec-validator	==3.0.3 -> ==3.0.4

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Release Notes

Yelp/swagger_spec_validator (swagger-spec-validator)

### [`v3.0.4`](https://togithub.com/Yelp/swagger_spec_validator/compare/v3.0.3...v3.0.4) [Compare Source](https://togithub.com/Yelp/swagger_spec_validator/compare/v3.0.3...v3.0.4)

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