fixed issues with build

Author: Matze99

src/clips/mask/roundRectangleMask.ts

@@ -1,7 +1,7 @@
-import {Graphics} from "pixi.js";
 import { RoundRectangleMaskProps } from "./mask.types";
+import { Mask } from "./mask";
 
-export class RoundRectangleMask extends Graphics {
+export class RoundRectangleMask extends Mask {
     private _rectangleWidth: number;
     private _rectangleHeight: number;
     private _borderRadius: number;

src/clips/mask/starMask.ts

@@ -1,10 +1,6 @@
-import {Graphics} from "pixi.js";
 import { StarMaskProps } from "./mask.types";
 import { Mask } from "./mask";
 
-
-
-
 export class StarMask extends Mask {
 
     private _numberOfPoints: number;

src/tracks/media/media.spec.ts

@@ -13,7 +13,7 @@ import { MediaTrack } from './media';
 import { AudioSource } from '../../sources';
 
 class MockMediaClip extends MediaClip {
-	constructor(duration: number, range: [Timestamp, Timestamp], silences: { start: Timestamp, stop: Timestamp }[], element: HTMLMediaElement) {
+	constructor(range: [Timestamp, Timestamp], silences: { start: Timestamp, stop: Timestamp }[], element: HTMLMediaElement) {
 		super();
 		this.duration.millis = range[1].millis - range[0].millis;
 		this.range = range;
@@ -37,15 +37,15 @@ describe('The Media Track Object', () => {
 	});
 
 	it('ignores no silences', async () => {
-		const clip = new MockMediaClip(30000, [new Timestamp(10000), new Timestamp(20000)], [], new Audio());
+		const clip = new MockMediaClip([new Timestamp(10000), new Timestamp(20000)], [], new Audio());
 		clip.duration.frames = 30;
 		await track.add(clip);
 		await track.removeSilences();
 		expect(track.clips.length).toBe(1);
 	});
 
 	it('ignores not applicable silences', async () => {
-		const clip = new MockMediaClip(30000, [new Timestamp(10000), new Timestamp(20000)], [
+		const clip = new MockMediaClip([new Timestamp(10000), new Timestamp(20000)], [
 			{
 				start: new Timestamp(0),
 				stop: new Timestamp(500),
@@ -63,7 +63,7 @@ describe('The Media Track Object', () => {
 	});
 
 	it('removes silences', async () => {
-		const clip = new MockMediaClip(30000, [new Timestamp(10000), new Timestamp(20000)], [
+		const clip = new MockMediaClip([new Timestamp(10000), new Timestamp(20000)], [
 			{
 				start: new Timestamp(0),
 				stop: new Timestamp(10050),