Bump vaadin-bom from 10.0.16 to 10.0.19 in /servlet-vaadin-v10

Bumps vaadin-bom from 10.0.16 to 10.0.19.

---
updated-dependencies:
- dependency-name: com.vaadin:vaadin-bom
  dependency-type: direct:production
...

Signed-off-by: dependabot[bot] <support@github.com>
diff --git a/servlet-vaadin-v10/pom.xml b/servlet-vaadin-v10/pom.xml
index 38964d8..79d6dd1 100644
--- a/servlet-vaadin-v10/pom.xml
+++ b/servlet-vaadin-v10/pom.xml
@@ -33,7 +33,7 @@
 
   <properties>
     <transpilation.output>${project.build.directory}/build</transpilation.output>
-    <vaadin.version>10.0.16</vaadin.version>
+    <vaadin.version>10.0.19</vaadin.version>
   </properties>
 
   <pluginRepositories>