csl: Post-release CSL libraries 19.6.0-SNAPSHOT

The release is done. Move to the next version.

JIRA Issues: CSL-8130

Differential Revision: https://phabricator.twitter.biz/D316720

README.md

@@ -1,6 +1,6 @@
 # Twitter Util
 
-[![Build status](https://travis-ci.org/twitter/util.svg?branch=master)](https://travis-ci.org/twitter/util)
+[![Build status](https://travis-ci.org/twitter/util.svg?branch=develop)](https://travis-ci.org/twitter/util)
 [![Codecov](https://codecov.io/gh/twitter/util/branch/develop/graph/badge.svg)](https://codecov.io/gh/twitter/util)
 [![Project status](https://img.shields.io/badge/status-active-brightgreen.svg)](#status)
 [![Gitter](https://badges.gitter.im/twitter/finagle.svg)](https://gitter.im/twitter/finagle?utm_source=badge&utm_medium=badge&utm_campaign=pr-badge)

build.sbt

@@ -1,7 +1,7 @@
 import scoverage.ScoverageKeys
 
 // All Twitter library releases are date versioned as YY.MM.patch
-val releaseVersion = "19.5.0"
+val releaseVersion = "19.6.0-SNAPSHOT"
 
 val zkVersion = "3.5.0-alpha"
 val zkClientVersion = "0.0.81"