Update README.md

Updated to reflect master is now 4.6

Author: cleemullins

README.md

@@ -11,12 +11,7 @@ This repo is part the [Microsoft Bot Framework](https://github.com/microsoft/bot
 
  | Branch | Description        | Build Status | Coverage Status | Windows Bot Test Status | Linux Bot Test Status |
  |----|---------------|--------------|-----------------|--|--|
-|Master | 4.5.* Preview Builds |[![Build status](https://fuselabs.visualstudio.com/SDK_v4/_apis/build/status/JS/BotBuilder-JS-master-daily)](https://fuselabs.visualstudio.com/SDK_v4/_build/latest?definitionId=460)|[![Coverage Status](https://coveralls.io/repos/github/microsoft/botbuilder-js/badge.svg?branch=master)](https://coveralls.io/github/microsoft/botbuilder-js?branch=master)|[![Build Status](https://fuselabs.visualstudio.com/SDK_v4/_apis/build/status/JS/Run-JS-Functional-Tests-Windows?branchName=master)](https://fuselabs.visualstudio.com/SDK_v4/_build/latest?definitionId=548&branchName=master)|[![Build Status](https://fuselabs.visualstudio.com/SDK_v4/_apis/build/status/JS/Run-JS-Functional-Tests-Linux?branchName=master)](https://fuselabs.visualstudio.com/SDK_v4/_build/latest?definitionId=549&branchName=master)
-|4.4 | 4.4.* Preview Builds |[![Build status](https://fuselabs.visualstudio.com/SDK_v4/_apis/build/status/JS/BotBuilder-JS-master-daily)](https://fuselabs.visualstudio.com/SDK_v4/_build/latest?definitionId=460&branch=4.4)|N/A|N/A|N/A
-|4.3 | 4.3.* Preview Builds |[![Build status](https://fuselabs.visualstudio.com/SDK_v4/_apis/build/status/BotBuilder-JS%204.0%20master?branchName=4.3)](https://fuselabs.visualstudio.com/SDK_v4/_build/latest?definitionId=374)|N/A|N/A|N/A
-|4.2 | 4.2.* Preview Builds |[![Build status](https://travis-ci.org/Microsoft/botbuilder-js.svg?branch=4.2)](https://travis-ci.org/Microsoft/botbuilder-js) |N/A|N/A|N/A
- |4.1 | 4.1.* Patch Builds |[![Build status](https://travis-ci.org/Microsoft/botbuilder-js.svg?branch=4.1)](https://travis-ci.org/Microsoft/botbuilder-js) |N/A|N/A|N/A
- |4.0 | 4.0.* Patch Builds | [![Build status](https://travis-ci.org/Microsoft/botbuilder-js.svg?branch=4.0)](https://travis-ci.org/Microsoft/botbuilder-js) |N/A|N/A|N/A
+|Master | 4.6.* Preview Builds |[![Build status](https://fuselabs.visualstudio.com/SDK_v4/_apis/build/status/JS/BotBuilder-JS-master-daily)](https://fuselabs.visualstudio.com/SDK_v4/_build/latest?definitionId=460)|[![Coverage Status](https://coveralls.io/repos/github/microsoft/botbuilder-js/badge.svg?branch=master)](https://coveralls.io/github/microsoft/botbuilder-js?branch=master)|[![Build Status](https://fuselabs.visualstudio.com/SDK_v4/_apis/build/status/JS/Run-JS-Functional-Tests-Windows?branchName=master)](https://fuselabs.visualstudio.com/SDK_v4/_build/latest?definitionId=548&branchName=master)|[![Build Status](https://fuselabs.visualstudio.com/SDK_v4/_apis/build/status/JS/Run-JS-Functional-Tests-Linux?branchName=master)](https://fuselabs.visualstudio.com/SDK_v4/_build/latest?definitionId=549&branchName=master)
 
 [![License](https://img.shields.io/badge/license-MIT-blue.svg)](https://github.com/Microsoft/botbuilder-js/blob/master/LICENSE)
 [![Gitter](https://img.shields.io/gitter/room/Microsoft/BotBuilder.svg)](https://gitter.im/Microsoft/BotBuilder)