Update dependency io.swagger.parser.v3:swagger-parser to v2.1.20

[renovate[bot]]

This PR contains the following updates:

Package	Change	Age	Adoption	Passing	Confidence
io.swagger.parser.v3:swagger-parser (source)	2.1.19 -> 2.1.20

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Release Notes

swagger-api/swagger-parser (io.swagger.parser.v3:swagger-parser)

### [`v2.1.20`](https://togithub.com/swagger-api/swagger-parser/releases/tag/v2.1.20): Swagger-parser 2.1.20 released! [Compare Source](https://togithub.com/swagger-api/swagger-parser/compare/v2.1.19...v2.1.20) - update dependencies ([#​2042](https://togithub.com/swagger-api/swagger-parser/issues/2042)) - fixed issue 2034, added test case for issue ([#​2035](https://togithub.com/swagger-api/swagger-parser/issues/2035)) - SWG-9288 utilizing safe url resolver for OAS 3.0 parsing ([#​2032](https://togithub.com/swagger-api/swagger-parser/issues/2032))

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Configuration

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[sonarcloud[bot]]

Quality Gate passed

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