Problema de charset UTF-8

Estou usando com Angular 7 e Typescript
Gera o arquivo *csv mas abre com esses erros de caracteres.
```
import { Component } from '@angular/core';
import * as fileSaver from 'file-saver';

@Component({
selector: 'ngx-cadastro-clientes',
styleUrls: ['./clientes.component.scss'],
templateUrl: './clientes.component.html',
})
export class ClientesComponent {

downloadCSV() {
const replacer = (key, value) => value === null ? '' : value;
const header = Object.keys(this.data[0]);
let csv = this.data.map(row => header.map(fieldName => JSON.stringify(row[fieldName], replacer)).join(';'));
csv.unshift(header.join(';'));
let csvArray = csv.join('\r\n');
var blob = new Blob([csvArray], { type: "text/csv;charset=utf-8" })
fileSaver.saveAs(blob, "clientes.csv");
}
}

```