Bumped version number from 2.3 to 2.3.1 so that the app could be uploaded to apps.splunk.com and--most importantly--customers have a path for upgrading from 2.3 to 2.3.1.
Bumped version number from 2.3 to 2.3.1 so that the app could be uploaded to apps.splunk.com and--most importantly--customers have a path for upgrading from 2.3 to 2.3.1.

Signed-off-by: David Noble <9f8c5781dec4665d293b95d5c3728727376b1779@splunk.com>

splunk/splunk-app-twitter,dakiri/splunk-app-twitter,dakiri/splunk-app-twitter