Bump us.springett:alpine-parent from 1.10.5 to 3.1.0 in /example

Bumps [us.springett:alpine-parent](https://github.com/stevespringett/Alpine) from 1.10.5 to 3.1.0.
- [Release notes](https://github.com/stevespringett/Alpine/releases)
- [Commits](alpine-parent-1.10.5...alpine-parent-3.1.0)

---
updated-dependencies:
- dependency-name: us.springett:alpine-parent
  dependency-type: direct:production
  update-type: version-update:semver-major
...

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

example/pom.xml

@@ -5,7 +5,7 @@
     <parent>
         <groupId>us.springett</groupId>
         <artifactId>alpine-parent</artifactId>
-        <version>1.10.5</version>
+        <version>3.1.0</version>
     </parent>
 
     <modelVersion>4.0.0</modelVersion>