Make PerFieldObjectMapperProvider optional fix #405

Author: oliemansm

graphql-kickstart-spring-boot-autoconfigure-tools/src/main/java/graphql/kickstart/tools/boot/GraphQLJavaToolsAutoConfiguration.java

@@ -90,7 +90,7 @@ public SchemaStringProvider schemaStringProvider() {
   @ConditionalOnMissingBean
   @ConfigurationProperties("graphql.tools.schema-parser-options")
   public SchemaParserOptions.Builder optionsBuilder(
-      PerFieldObjectMapperProvider perFieldObjectMapperProvider
+      @Autowired(required = false) PerFieldObjectMapperProvider perFieldObjectMapperProvider
   ) {
     SchemaParserOptions.Builder optionsBuilder = SchemaParserOptions.newOptions();