Bump mina-core from 2.0.16 to 2.1.5

Bumps [mina-core](https://github.com/apache/mina) from 2.0.16 to 2.1.5.
- [Release notes](https://github.com/apache/mina/releases)
- [Commits](https://github.com/apache/mina/compare/2.0.16...2.1.5)

---
updated-dependencies:
- dependency-name: org.apache.mina:mina-core
  dependency-type: direct:production
...

Signed-off-by: dependabot[bot] <support@github.com>

pom.xml

@@ -246,7 +246,7 @@
 		<dependency>
 			<groupId>org.apache.mina</groupId>
 			<artifactId>mina-core</artifactId>
-			<version>2.0.16</version>
+			<version>2.1.5</version>
 		</dependency>
 
 		<!--http相关jar -->