chore(package): bump core generator dependency version

Author: CarstenWickner

pom.xml

@@ -58,7 +58,7 @@
         <maven.compiler.source>1.8</maven.compiler.source>
         <maven.compiler.target>1.8</maven.compiler.target>
 
-        <version.generator>4.0.0</version.generator>
+        <version.generator>4.3.0</version.generator>
 
         <version.javax.validation>2.0.1.Final</version.javax.validation>
 

src/test/resources/com/github/victools/jsonschema/module/javax/validation/integration-test-result.json

@@ -38,9 +38,7 @@
                 "type": "string"
             }
         },
-        "nullObject": {
-            "type": ["object", "null"]
-        },
+        "nullObject": {},
         "sizeRangeList": {
             "minItems": 3,
             "maxItems": 25,