Improve the problem of not being able to start BeanPostProcessorChecker and SecurityAutoConfiguration when disabled. (#257)

Co-authored-by: Yuichiro SHIBAYAMA <[email protected]>

Author: yu-shiba

grpc-spring-boot-starter/src/main/java/org/lognet/springboot/grpc/security/GrpcSecurityConfiguration.java

@@ -44,7 +44,7 @@ public class GrpcSecurityConfiguration {
     private GrpcSecurity grpcSecurity;
 
     @Bean
-    public BeanPostProcessor bypassMethodInterceptorForGrpcMethodInvocation(){
+    public static BeanPostProcessor bypassMethodInterceptorForGrpcMethodInvocation(){
         return new BeanPostProcessor() {
             @Override
             public Object postProcessAfterInitialization(Object bean, String beanName) throws BeansException {