Merge pull request #1803 from baomidou/dependabot/gradle/springVersion-5.2.1.RELEASE

Bump springVersion from 5.2.0.RELEASE to 5.2.1.RELEASE

build.gradle

@@ -23,7 +23,7 @@ ext {
         mybatisVersion = '3.5.3',
         mybatisSpringVersion = '2.0.3',
         mybatisSpringBootStarterVersion = '2.1.1',
-        springVersion = '5.2.0.RELEASE',
+        springVersion = '5.2.1.RELEASE',
         springBootVersion = '2.2.1.RELEASE',
         jsqlparserVersion = '3.0',
         junitVersion = '5.5.2',