Upgrade to 2.1

Start development of Spring Session MongoDB 2.1. Migrate to:

Reactor Californium
Spring Framework 5.1
Spring Security 5.1
Spring Session 2.1
Spring Data Lovelace

deploy.bash

@@ -1,6 +1,6 @@
 #!/bin/bash -x
 
-if [ "${CIRCLE_BRANCH}" == "master" ]; then
+if [ "${CIRCLE_BRANCH}" == "master" ] || [ "${CIRCLE_BRANCH}" == "2.0.x" ]; then
 	mvn -Pdistribute,snapshot,docs clean deploy
 else
 	echo "We only deploy 'master' branch"