dashjs@3.0.0/build/typings/index.d.ts have 3 errors about "which lacks return-type annotation, implicitly has an 'any' return type"

Created by: gzlock

Environment

• The MPD passes the DASH-IF Conformance Tool on https://conformance.dashif.org/
• The stream has correct Access-Control-Allow-Origin headers (CORS)
• There are no network errors such as 404s in the browser console when trying to play the stream
• The issue observed is not mentioned on https://github.com/Dash-Industry-Forum/dash.js/wiki/FAQ
• The issue occurs in the latest reference client on http://reference.dashif.org/dash.js/ and not just on my page

• Link to playable MPD file: None
• Dash.js version: dashjs@3.0.0
• Browser name/version: Not in browser
• OS name/version: Ubuntu 16.04.6 LTS
• node.js version: v12.10.0
• npm version: 6.10.3
• typescript version: 3.6.2

Steps to reproduce

Use travis-ci.org

The .travis.yml

language: node_js
node_js:
  - node
matrix:
  fast_finish: true
install:
  - npm install
script:
  - npm run build
cache:
  directories:
    - node_modules

The global.d.ts

import * as dashjs from 'dashjs'

declare global {
  const dashjs: typeof dashjs
}

Console output

-  Building for production...
Starting type checking service...
Using 1 worker with 2048MB memory limit
 ERROR  Failed to compile with 3 errors3:04:28 PM
 error  in /home/travis/build/gzlock/danplayer/node_modules/dashjs/build/typings/index.d.ts
ERROR in /home/travis/build/gzlock/danplayer/node_modules/dashjs/build/typings/index.d.ts
42:9 'setKeySystems', which lacks return-type annotation, implicitly has an 'any' return type.
    40 |         getSupportedKeySystemsFromContentProtection(cps: any[]): SupportedKeySystem[];
    41 |         getKeySystems(): KeySystem[];
  > 42 |         setKeySystems(keySystems: KeySystem[]);
       |         ^
    43 |         stop(): void;
    44 |         reset(): void;
    45 |     }
 error  in /home/travis/build/gzlock/danplayer/node_modules/dashjs/build/typings/index.d.ts
ERROR in /home/travis/build/gzlock/danplayer/node_modules/dashjs/build/typings/index.d.ts
296:9 'updateSettings', which lacks return-type annotation, implicitly has an 'any' return type.
    294 |         getAverageThroughput(value: number): void;
    295 |         getSettings(): MediaPlayerSettingClass;
  > 296 |         updateSettings(settings: MediaPlayerSettingClass);
        |         ^
    297 |         resetSettings(): void;
    298 |     }
    299 | 
 error  in /home/travis/build/gzlock/danplayer/node_modules/dashjs/build/typings/index.d.ts
ERROR in /home/travis/build/gzlock/danplayer/node_modules/dashjs/build/typings/index.d.ts
822:9 'getLatestBufferInfoVO', which lacks return-type annotation, implicitly has an 'any' return type.
    820 |     export interface DashMetrics {
    821 |         getCurrentRepresentationSwitch(type: 'video' | 'audio' | 'image', readOnly: boolean): ICurrentRepresentationSwitch;
  > 822 |         getLatestBufferInfoVO()
        |         ^
    823 |         getCurrentBufferLevel(type: 'video' | 'audio' | 'image', readOnly: boolean): number;
    824 |         getCurrentHttpRequest(type: 'video' | 'audio' | 'image', readOnly: boolean): object;
    825 |         getHttpRequests(type: 'video' | 'audio' | 'image'): object[];
 ERROR  Build failed with errors.
npm ERR! code ELIFECYCLE
npm ERR! errno 1
npm ERR! danplayer@0.1.0 build: `cross-env TARGET=docs vue-cli-service build --fix`
npm ERR! Exit status 1
npm ERR! 
npm ERR! Failed at the danplayer@0.1.0 build script.
npm ERR! This is probably not a problem with npm. There is likely additional logging output above.
npm ERR! A complete log of this run can be found in:
npm ERR!     /home/travis/.npm/_logs/2019-09-10T15_04_28_327Z-debug.log
The command "npm run build" exited with 1.