升级 spring boot 2.x 支持

build.gradle

@@ -7,7 +7,7 @@ ext {
         mybatisSpringVersion = '1.3.2',
         mybatisVersion = '3.4.6',
         springVersion = '4.3.5.RELEASE',
-        springBootVersion = '1.5.9.RELEASE',
+        springBootVersion = '2.0.1.RELEASE',
     ]
 
     dependencies = [