fix(interceptor): fixes api changes of NestJS version 6

BREAKING CHANGE: NestJS version required is 6.x

fix #11

README.md

@@ -23,8 +23,8 @@ $ npm i --save nest-raven
 ```
 
 ### Versions
-
- * **3.x** Is for nest v5.x and introduces @sentry/minimal
+ * **4.x** Is for Next v6.x
+ * **3.x** Is for Nest v5.x and introduces @sentry/minimal
  * **2.x** Is for Nest v5.x
  * **1.x** Is for Nest v4.x
 
@@ -69,7 +69,7 @@ With this setup, sentry will pick up all exceptions (even 400 types).
 #### Global
 If you want to set up interceptor as global, you have to follow Nest
 instructions [here](https://docs.nestjs.com/interceptors). Something like
-this:
+this. This only works for Controllers not for Gateways (limitation by NestJS):
 
 > app.module.ts
 

lib/raven.interceptor.ts

@@ -1,6 +1,7 @@
 import {
   ExecutionContext, Injectable,
   NestInterceptor,
+  CallHandler,
 } from '@nestjs/common';
 import { IRavenInterceptorOptions } from './raven.interfaces';
 import { Observable } from 'rxjs';
@@ -18,13 +19,14 @@ export class RavenInterceptor implements NestInterceptor {
 
   intercept(
     context: ExecutionContext,
-    call$: Observable<any>,
+    next: CallHandler,
   ): Observable<any> {
     const httpRequest = context.switchToHttp().getRequest();
     const userData = httpRequest ? httpRequest.user : null;
 
     // first param would be for events, second is for errors
-    return call$.pipe(
+    return next.handle()
+    .pipe(
       tap(null, (exception) => {
         if (this.shouldReport(exception)) {
           Sentry.withScope(scope => this.captureException(scope, httpRequest, userData, exception));