Bump shiro-spring from 1.4.0 to 1.7.1

Bumps shiro-spring from 1.4.0 to 1.7.1.

---
updated-dependencies:
- dependency-name: org.apache.shiro:shiro-spring
  dependency-type: direct:production
...
Signed-off-by: Ndependabot[bot] <support@github.com>

pom.xml

@@ -17,7 +17,7 @@
 		<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
 		<project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>
 		<java.version>1.8</java.version>
-		<shiro.version>1.4.0</shiro.version>
+		<shiro.version>1.7.1</shiro.version>
 		<thymeleaf.extras.shiro.version>2.0.0</thymeleaf.extras.shiro.version>
 		<mybatis.boot.version>1.3.2</mybatis.boot.version>
 		<druid.version>1.1.14</druid.version>