upgrade spring-boot to 2.2.6

Author: bnasslahsen

pom.xml

@@ -11,7 +11,7 @@
 	<parent>
 		<groupId>org.springframework.boot</groupId>
 		<artifactId>spring-boot-starter-parent</artifactId>
-		<version>2.2.5.RELEASE</version>
+		<version>2.2.6.RELEASE</version>
 	</parent>
 
 	<licenses>