chore(deps): bump swagger-parser from 2.1.12 to 2.1.26

[brennoo]

This PR is bumping io.swagger.parser.v3:swagger-parser from 2.1.12 (Feb 15, 2023) to 2.1.26 (Mar 25, 2025)

After the update some tests started failing, example:

ReverseAstTest > OpenAPI extension JsonPointers are parsed correctly() FAILED
    org.opentest4j.AssertionFailedError:
    expected: /info/x-test-extension
     but was: /info//x-test-extension
        at java.base@17.0.15/jdk.internal.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
        at java.base@17.0.15/jdk.internal.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:77)
        at java.base@17.0.15/jdk.internal.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
        at java.base@17.0.15/java.lang.reflect.Constructor.newInstanceWithCaller(Constructor.java:500)
        at app//org.zalando.zally.core.ast.ReverseAstTest.OpenAPI extension JsonPointers are parsed correctly(ReverseAstTest.kt:240) 

so I had to make an adjust in handleObject to ensure that the extension map itself wont add an empty path.

after that, there were some issues with java-mail, example:

JsonSchemaValidatorTest > invalid schemas result in empty violation pointers() FAILED
    java.lang.NoClassDefFoundError: javax/mail/internet/AddressException
        at com.github.fge.jsonschema.library.format.CommonFormatAttributesDictionary.<clinit>(CommonFormatAttributesDictionary.java:56)
        at com.github.fge.jsonschema.library.format.DraftV3FormatAttributesDictionary.<clinit>(DraftV3FormatAttributesDictionary.java:47)
        at com.github.fge.jsonschema.library.DraftV3Library.<clinit>(DraftV3Library.java:36)
        at com.github.fge.jsonschema.cfg.ValidationConfigurationBuilder.<clinit>(ValidationConfigurationBuilder.java:63)
        at com.github.fge.jsonschema.cfg.ValidationConfiguration.newBuilder(ValidationConfiguration.java:97)
        at org.zalando.zally.core.JsonSchemaValidator.createValidatorFactory(JsonSchemaValidator.kt:83)
        at org.zalando.zally.core.JsonSchemaValidator.<init>(JsonSchemaValidator.kt:29)
        at org.zalando.zally.core.JsonSchemaValidator.<init>(JsonSchemaValidator.kt:18)
        at org.zalando.zally.core.JsonSchemaValidatorTest.invalid schemas result in empty violation pointers(JsonSchemaValidatorTest.kt:64)

        Caused by:
        java.lang.ClassNotFoundException: javax.mail.internet.AddressException
            at java.base/jdk.internal.loader.BuiltinClassLoader.loadClass(BuiltinClassLoader.java:641)
            at java.base/jdk.internal.loader.ClassLoaders$AppClassLoader.loadClass(ClassLoaders.java:188)
            at java.base/java.lang.ClassLoader.loadClass(ClassLoader.java:525)
            ... 9 more 

making the dependency explicit fixed those, build s green ✅

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