GUACAMOLE-1763: Update Java dependencies to latest compatible versions.

doc/licenses/jose4j-0.9.1/README

@@ -1,7 +1,7 @@
 jose.4.j (https://bitbucket.org/b_c/jose4j/)
 --------------------------------------------
 
-    Version: 0.9.1
+    Version: 0.9.3
     From: 'Brian Campbell' (https://bitbucket.org/b_c/)
     License(s):
         Apache v2.0

doc/licenses/jose4j-0.9.1/dep-coordinates.txt

@@ -1 +1 @@
-org.bitbucket.b_c:jose4j:jar:0.9.1
+org.bitbucket.b_c:jose4j:jar:0.9.3