Merge branch 'feature/increase-spring-boot-version' into 'master'

increase spring boot version;

See merge request !25

pom.xml

@@ -7,7 +7,7 @@
     <parent>
         <groupId>org.springframework.boot</groupId>
         <artifactId>spring-boot-starter-parent</artifactId>
-        <version>2.1.7.RELEASE</version>
+        <version>2.1.16.RELEASE</version>
         <relativePath/> <!-- lookup parent from repository -->
     </parent>