update tslint -> eslint

src/app/widget-modules/pipes/key-translator/key-translator.module.ts

@@ -2,15 +2,9 @@ import {NgModule} from '@angular/core';
 import {CommonModule} from '@angular/common';
 import {KeyPipe} from './key.pipe';
 
-
 @NgModule({
   declarations: [KeyPipe],
-  exports: [
-    KeyPipe
-  ],
-  imports: [
-    CommonModule
-  ]
+  exports: [KeyPipe],
+  imports: [CommonModule],
 })
-export class KeyTranslatorModule {
-}
+export class KeyTranslatorModule {}

src/app/widget-modules/pipes/key-translator/key.pipe.spec.ts

@@ -3,6 +3,6 @@ import {KeyPipe} from './key.pipe';
 describe('KeyPipe', () => {
   it('create an instance', () => {
     const pipe = new KeyPipe();
-    expect(pipe).toBeTruthy();
+    void expect(pipe).toBeTruthy();
   });
 });

src/app/widget-modules/pipes/key-translator/key.pipe.ts

@@ -2,12 +2,10 @@ import {Pipe, PipeTransform} from '@angular/core';
 import {scaleMapping} from '../../../modules/songs/services/key.helper';
 
 @Pipe({
-  name: 'key'
+  name: 'key',
 })
 export class KeyPipe implements PipeTransform {
-
-  transform(key: string): string {
+  public transform(key: string): string {
     return scaleMapping[key];
   }
-
 }