update readme

Author: chenkie

README.md

@@ -1,6 +1,8 @@
 # @auth0/angular-jwt
 
-### **NOTE:** This library is now at version 1.0 and is published on npm as `@auth0/angular-jwt`. If you're looking for the pre-v1.0 version of this library, it can be found in the `pre-v1.0` branch and on npm as `angular2-jwt`.
+### **NOTE:** This library is now at version 2 and is published on npm as `@auth0/angular-jwt`. If you're looking for the pre-v1.0 version of this library, it can be found in the `pre-v1.0` branch and on npm as `angular2-jwt`.
+
+**@auth0/angular-jwt v2 is to be used with Angular v6+ and RxJS v6+. For Angular v4.3 to v5+, use @auth0/angular-jwt v1**
 
 This library provides an `HttpInterceptor` which automatically attaches a [JSON Web Token](https://jwt.io) to `HttpClient` requests.
 
@@ -127,7 +129,11 @@ initial auth route(s) are on a whitelisted domain and take basic auth headers.
 JwtModule.forRoot({
   config: {
     // ...
-    blacklistedRoutes: ['localhost:3001/auth/', 'foo.com/bar/', /localhost:3001\/foo\/far.*/] // strings and regular expressions
+    blacklistedRoutes: [
+      'localhost:3001/auth/',
+      'foo.com/bar/',
+      /localhost:3001\/foo\/far.*/
+    ] // strings and regular expressions
   }
 });
 ```