Bump io.swagger.parser.v3:swagger-parser from 2.1.19 to 2.1.20

Bumps [io.swagger.parser.v3:swagger-parser](https://github.com/swagger-api/swagger-parser) from 2.1.19 to 2.1.20.
- [Release notes](https://github.com/swagger-api/swagger-parser/releases)
- [Commits](swagger-api/swagger-parser@v2.1.19...v2.1.20)

---
updated-dependencies:
- dependency-name: io.swagger.parser.v3:swagger-parser
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

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

Author: dependabot[bot]

gradle/libs.versions.toml

@@ -28,7 +28,7 @@ jackson-kotlin = { module = "com.fasterxml.jackson.module:jackson-module-kotlin"
 snakeyaml = "org.yaml:snakeyaml:2.2"
 
 openapi4j = "org.openapi4j:openapi-parser:1.0.7"
-swagger = "io.swagger.parser.v3:swagger-parser:2.1.19"
+swagger = "io.swagger.parser.v3:swagger-parser:2.1.20"
 
 antlr = "org.antlr:antlr4:4.13.1"