Update gradle.properties

gradle.properties

@@ -100,7 +100,7 @@ druidVersion                    =1.2.16
 druidspringbootstarterVersion   =1.2.16
 jedisVersion                    =4.2.3
 caffeineVersion                 =2.9.3
-mybatisVersion                  =3.5.11
+mybatisVersion                  =3.5.12
 mybatisspringVersion            =2.0.7
 #saml
 opensamlVersion                 =2.6.6