build: Replace Codelyzer and TSLint with Angular ESLint

Migrate from the deprecated TSLint to Angluar ESLint. Also fix current
linting issues in the code, in particular:

- Use strict equals operators (=== and !==)
- Remove empty lifecycle methods (mostly ngOnInit)
- Output bindings including aliases should not be named as standard dom
  events (submit)
- Async pipe results should not be negated

src/app/shared/input-amount/input-amount.component.ts

@@ -1,4 +1,4 @@
-import { Component, Input, OnInit } from '@angular/core';
+import { Component, Input } from '@angular/core';
 import { Currency } from '../models/general.model';
 import { UntypedFormControl } from '@angular/forms';
 
@@ -7,7 +7,7 @@ import { UntypedFormControl } from '@angular/forms';
   templateUrl: './input-amount.component.html',
   styleUrls: ['./input-amount.component.scss']
 })
-export class InputAmountComponent implements OnInit {
+export class InputAmountComponent {
 
   @Input() isRequired = false;
   @Input() currency: Currency;
@@ -18,9 +18,6 @@ export class InputAmountComponent implements OnInit {
 
   constructor() { }
 
-  ngOnInit(): void {
-  }
-
   numberOnly(event: any): boolean {
     const charCode = (event.which) ? event.which : event.keyCode;
     if (charCode === 46) {