Declare the most specific return type possible on some bean declaration

This is safer for components that implement several interfaces or for
components potentially referred to by their implementation type (see
'Declaring a bean' on spring core documentation)

Author: christophejan

springdoc-openapi-common/src/main/java/org/springdoc/core/SpringDocConfiguration.java

@@ -51,7 +51,6 @@
 import org.springdoc.core.customizers.DelegatingMethodParameterCustomizer;
 import org.springdoc.core.customizers.OpenApiBuilderCustomizer;
 import org.springdoc.core.customizers.OpenApiCustomiser;
-import org.springdoc.core.customizers.OperationCustomizer;
 import org.springdoc.core.customizers.PropertyCustomizer;
 import org.springdoc.core.customizers.ServerBaseUrlCustomizer;
 import org.springdoc.core.providers.ActuatorProvider;
@@ -109,6 +108,7 @@
 /**
  * The type Spring doc configuration.
  * @author bnasslahsen
+ * @author christophejan
  */
 @Lazy(false)
 @Configuration(proxyBeanMethods = false)
@@ -359,7 +359,7 @@ OpenApiCustomiser propertiesResolverForSchema(PropertyResolverUtils propertyReso
 	@Conditional(CacheOrGroupedOpenApiCondition.class)
 	@ConditionalOnClass(name = BINDRESULT_CLASS)
 	@Lazy(false)
-	static BeanFactoryPostProcessor springdocBeanFactoryPostProcessor() {
+	static SpringdocBeanFactoryConfigurer springdocBeanFactoryPostProcessor() {
 		return new SpringdocBeanFactoryConfigurer();
 	}
 
@@ -435,7 +435,7 @@ static class SpringDocActuatorConfiguration {
 		@Lazy(false)
 		@ConditionalOnManagementPort(ManagementPortType.DIFFERENT)
 		@Conditional(MultipleOpenApiSupportCondition.class)
-		static BeanFactoryPostProcessor springdocBeanFactoryPostProcessor3(List<GroupedOpenApi> groupedOpenApis) {
+		static SpringdocActuatorBeanFactoryConfigurer springdocBeanFactoryPostProcessor3(List<GroupedOpenApi> groupedOpenApis) {
 			return new SpringdocActuatorBeanFactoryConfigurer(groupedOpenApis);
 		}
 
@@ -447,7 +447,7 @@ static BeanFactoryPostProcessor springdocBeanFactoryPostProcessor3(List<GroupedO
 		@Bean
 		@Lazy(false)
 		@ConditionalOnManagementPort(ManagementPortType.SAME)
-		OperationCustomizer actuatorCustomizer() {
+		ActuatorOperationCustomizer actuatorCustomizer() {
 			return new ActuatorOperationCustomizer();
 		}
 
@@ -460,7 +460,7 @@ OperationCustomizer actuatorCustomizer() {
 		@Bean
 		@Lazy(false)
 		@ConditionalOnManagementPort(ManagementPortType.SAME)
-		OpenApiCustomiser actuatorOpenApiCustomiser(WebEndpointProperties webEndpointProperties) {
+		ActuatorOpenApiCustomizer actuatorOpenApiCustomiser(WebEndpointProperties webEndpointProperties) {
 			return new ActuatorOpenApiCustomizer(webEndpointProperties);
 		}