Fully working with the rule no explicit any

bookie/src/app/shared/to-csv.service.ts

@@ -1,15 +1,19 @@
 import { Injectable } from '@angular/core';
 
+import { ToCsvType } from './to-csv-type';
+
 @Injectable({
   providedIn: 'root',
 })
 export class ToCsvService {
   // eslint-disable-next-line class-methods-use-this
-  toCsv(headers: any, data: any[]): string {
+  toCsv(headers: { [display: string]: string }, data: unknown[]): string {
     const header = Object.keys(headers);
     const replacer = (key: string, value: string | number | null) => (value === null ? '' : value);
     const csv = data.map((row) =>
-      header.map((fieldName) => JSON.stringify(row[headers[fieldName]], replacer)).join(','),
+      header
+        .map((fieldName) => JSON.stringify((row as ToCsvType)[headers[fieldName]], replacer))
+        .join(','),
     );
     csv.unshift(header.join(','));
     return csv.join('\r\n');