Refactor code to comply with ESLint rules

Major refactoring using ESLint with rules from AirBnb and Vue.

Enable most of the ESLint rules and do necessary linting in the code.
Also add more information for rules that are disabled to describe what
they are and why they are disabled.

Allow logging (`console.log`) in test files, and in development mode
(e.g. when working with `npm run serve`), but disable it when
environment is production (as pre-configured by Vue). Also add flag
(`--mode production`) in `lint:eslint` command so production linting is
executed earlier in lifecycle.

Disable rules that requires a separate work. Such as ESLint rules that
are broken in TypeScript: no-useless-constructor (eslint/eslint#14118)
and no-shadow (eslint/eslint#13014).

src/presentation/components/Shared/Responsive.vue

@@ -11,8 +11,11 @@ import { throttle } from './Throttle';
 @Component
 export default class Responsive extends Vue {
   private width: number;
+
   private height: number;
+
   private observer: ResizeObserver;
+
   private get container(): HTMLElement { return this.$refs.containerElement as HTMLElement; }
 
   public async mounted() {
@@ -29,6 +32,7 @@ export default class Responsive extends Vue {
     this.observer.observe(this.container);
     this.fireChangeEvents();
   }
+
   public updateSize() {
     let sizeChanged = false;
     if (this.isWidthChanged()) {
@@ -43,12 +47,15 @@ export default class Responsive extends Vue {
       this.$emit('sizeChanged');
     }
   }
+
   @Emit('widthChanged') public updateWidth(width: number) {
     this.width = width;
   }
+
   @Emit('heightChanged') public updateHeight(height: number) {
     this.height = height;
   }
+
   public destroyed() {
     if (this.observer) {
       this.observer.disconnect();
@@ -60,9 +67,11 @@ export default class Responsive extends Vue {
     this.updateHeight(this.container.offsetHeight);
     this.$emit('sizeChanged');
   }
+
   private isWidthChanged(): boolean {
     return this.width !== this.container.offsetWidth;
   }
+
   private isHeightChanged(): boolean {
     return this.height !== this.container.offsetHeight;
   }
@@ -77,4 +86,3 @@ export default class Responsive extends Vue {
   display: inline-block; // if inline then it has no height or weight
 }
 </style>
-