Bump jose4j from 0.7.0 to 0.9.3 in /foxtrot-server

Bumps [jose4j](https://bitbucket.org/b_c/jose4j) from 0.7.0 to 0.9.3.
- [Commits](https://bitbucket.org/b_c/jose4j/branches/compare/jose4j-0.9.3..jose4j-0.7.0)

---
updated-dependencies:
- dependency-name: org.bitbucket.b_c:jose4j
  dependency-type: direct:production
...

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

foxtrot-server/pom.xml

@@ -12,7 +12,7 @@
     <artifactId>foxtrot-server</artifactId>
 
     <properties>
-        <jose4j.version>0.7.0</jose4j.version>
+        <jose4j.version>0.9.3</jose4j.version>
     </properties>
 
     <dependencies>