Bump vaadin-server from 7.6.8 to 7.7.24

Bumps vaadin-server from 7.6.8 to 7.7.24.

Signed-off-by: dependabot[bot] <[email protected]>

Author: dependabot[bot]

pom.xml

@@ -22,7 +22,7 @@
       <dependency>
         <groupId>com.vaadin</groupId>
         <artifactId>vaadin-server</artifactId>
-        <version>7.6.8</version>
+        <version>7.7.24</version>
       </dependency>
       <dependency>
         <groupId>com.vaadin</groupId>