chore(deps): update to Angular 6 and RxJs 6.1

Adds compatibility for Angular 6 environments. Fixes #93, #94 

BREAKING CHANGE: This version is only compatible with Angular 6.

.nvmrc

@@ -1 +1 @@
-6.6.0
+8.11.1

modules/core/src/eventtargetinterruptsource.ts

@@ -1,10 +1,5 @@
-import 'rxjs/add/operator/filter';
-import 'rxjs/add/operator/throttleTime';
-import 'rxjs/add/observable/fromEvent';
-import 'rxjs/add/observable/merge';
-
-import { Observable } from 'rxjs/Observable';
-import { Subscription } from 'rxjs/Subscription';
+import { Observable, Subscription, fromEvent, merge } from 'rxjs';
+import { filter, throttleTime } from 'rxjs/operators';
 
 import { InterruptArgs } from './interruptargs';
 import { InterruptSource } from './interruptsource';
@@ -53,11 +48,15 @@ export class EventTargetInterruptSource extends InterruptSource {
     this.passive = !!options.passive;
 
     const opts = this.passive ? { passive: true } : null;
-    const fromEvents = events.split(' ').map(eventName => Observable.fromEvent<any>(target, eventName, opts));
-    this.eventSrc = Observable.merge(...fromEvents);
-    this.eventSrc = this.eventSrc.filter(innerArgs => !this.filterEvent(innerArgs));
+    const fromEvents = events.split(' ').map(eventName => fromEvent<any>(target, eventName, opts));
+    this.eventSrc = merge(...fromEvents);
+    this.eventSrc = this.eventSrc.pipe(
+      filter(innerArgs => !this.filterEvent(innerArgs))
+    );
     if (this.throttleDelay > 0) {
-      this.eventSrc = this.eventSrc.throttleTime(this.throttleDelay);
+      this.eventSrc = this.eventSrc.pipe(
+        throttleTime(this.throttleDelay)
+      );
     }
 
     let handler = (innerArgs: any) => this.onInterrupt.emit(new InterruptArgs(this, innerArgs));

modules/core/src/interrupt.ts

@@ -1,4 +1,4 @@
-import {Subscription} from 'rxjs/Subscription';
+import {Subscription} from 'rxjs';
 
 import {InterruptArgs} from './interruptargs';
 import {InterruptSource} from './interruptsource';

modules/core/src/interruptsource.ts

@@ -1,6 +1,7 @@
 import { EventEmitter } from '@angular/core';
 
 import { InterruptArgs } from './interruptargs';
+import 'zone.js';
 
 /*
  * A base for classes that act as a source for interrupts.