Log full stacktraces in UpdateChecker

Author: jonesdevelopment

api/src/main/java/xyz/jonesdev/sonar/api/update/UpdateChecker.java

@@ -65,6 +65,7 @@ public void checkForUpdates() {
         }
       } catch (Throwable throwable) {
         Sonar.get0().getLogger().warn("Unable to retrieve version information: {}", throwable);
+        throwable.printStackTrace(System.err);
         lastCheckResult = CheckResult.API_ERROR;
       }
     });