Update README.md

Added extra information when running a newer version of browser-sync and trying to use the proxy option.

Author: jcomack

README.md

@@ -68,15 +68,24 @@ browserSync.init(['css/*.css'], {
 
 **Proxy**
 
+Depending on what version of Browser Sync you're using, you will need to alter this configuration slightly.
+To check what version you're running, use: `npm view browser-sync version`
+
 ```js
-// Watch CSS files and use the proxy with your own server.
+// Watch CSS files and use the proxy with your own server. (For browser-sync versions < 0.7.0)
 browserSync.init(['css/*.css'], {
 proxy: {
 host: 'mylocal.dev',
 port: '8000'
 }
 });
 
+// Watch CSS files and use the proxy with your own server. (For browser-sync versions >= 0.7.0)
+browserSync.init(['css/*.css'], {
+proxy: 'mylocal.dev:8000'
+});
+
+
 ```
 
 **Using along-side other watch tasks (SASS)**