Bump io.swagger.parser.v3:swagger-parser from 2.1.19 to 2.1.21

Bumps [io.swagger.parser.v3:swagger-parser](https://github.com/swagger-api/swagger-parser) from 2.1.19 to 2.1.21.
- [Release notes](https://github.com/swagger-api/swagger-parser/releases)
- [Commits](swagger-api/swagger-parser@v2.1.19...v2.1.21)

---
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] <[email protected]>

Author: dependabot[bot]

cli/build.gradle

@@ -8,7 +8,7 @@ dependencies {
     implementation project(':openapi-style-validator-lib')
     implementation 'commons-cli:commons-cli:1.6.0'
     implementation 'org.slf4j:slf4j-jdk14:2.0.12'
-    implementation 'io.swagger.parser.v3:swagger-parser:2.1.19'
+    implementation 'io.swagger.parser.v3:swagger-parser:2.1.21'
     implementation 'org.openapitools.empoa:empoa-swagger-core:2.1.0'
     implementation 'com.fasterxml.jackson.core:jackson-databind:2.17.0'
 

gradle-plugin/build.gradle

@@ -4,7 +4,7 @@ plugins {
 
 dependencies {
     implementation project(':openapi-style-validator-lib')
-    implementation 'io.swagger.parser.v3:swagger-parser:2.1.19'
+    implementation 'io.swagger.parser.v3:swagger-parser:2.1.21'
     implementation 'org.openapitools.empoa:empoa-swagger-core:2.1.0'
     testImplementation 'junit:junit:4.13.2'
 }

maven-plugin/build.gradle

@@ -13,7 +13,7 @@ dependencies {
     }
 
     implementation project(':openapi-style-validator-lib')
-    implementation 'io.swagger.parser.v3:swagger-parser:2.1.19'
+    implementation 'io.swagger.parser.v3:swagger-parser:2.1.21'
     implementation 'io.swagger.core.v3:swagger-models:2.2.21'
     implementation 'org.openapitools.empoa:empoa-swagger-core:2.1.0'