fix: add explicit-object-schema flag

Author: daniel-kmiecik

README.md

@@ -668,6 +668,7 @@ final OpenAPI openAPI = new OpenAPIV3Parser().read("a.yaml", null, parseOptions)
 This option allows you to customize the processing of schema properties when the type is not specified. By default it is set to `true`.
 - `true` : when the type is not defined for property, ‘object’ is set.
 - `false` : the property remains undefined when no type is specified
+It's only applied when `resolveFully` is set to `true`.
 
 ### Extensions
 This project has a core artifact--`swagger-parser`, which uses Java Service Provider Interface (SPI) so additional extensions can be added. 

modules/swagger-parser-v3/src/main/java/io/swagger/v3/parser/util/ResolverFully.java

@@ -39,7 +39,15 @@ public class ResolverFully {
 
     private boolean aggregateCombinators;
 
-    private ParseOptions parseOptions;
+    private ParseOptions parseOptions = new ParseOptions();
+
+    public ResolverFully() {
+        this(true);
+    }
+
+    public ResolverFully(boolean aggregateCombinators) {
+        this.aggregateCombinators = aggregateCombinators;
+    }
 
     public ResolverFully(ParseOptions options) {
         if (options != null) {