fix: find & replace require with import

While both import and require can be used to import modules
in TypeScript, it is recommended to use import because it is
part of the ES6 module system and provides better performance.

app.ts

@@ -6,7 +6,7 @@ import { connect as mongoConnect } from './db_connect'
 const { resubscribeInvoices } = require('./ln');
 import { logger } from "./logger";
 import { Telegraf } from "telegraf";
-const { delay } = require('./util');
+import { delay } from './util';
 
 (async () => {
   process.on('unhandledRejection', e => {

bot/start.ts

@@ -13,7 +13,7 @@ import {
   Dispute,
   Config,
 } from '../models';
-const { getCurrenciesWithPrice, deleteOrderFromChannel } = require('../util');
+import { getCurrenciesWithPrice, deleteOrderFromChannel } from '../util';
 const {
   commandArgsMiddleware,
   stageMiddleware,

bot/validations.ts

@@ -9,8 +9,8 @@ const { parsePaymentRequest } = require('invoices');
 const { ObjectId } = require('mongoose').Types;
 import * as messages from './messages';
 import { Order, User, Community } from '../models';
-const { isIso4217, isDisputeSolver } = require('../util');
-const { existLightningAddress } = require('../lnurl/lnurl-pay');
+import { isIso4217, isDisputeSolver } from '../util';
+import { existLightningAddress } from '../lnurl/lnurl-pay';
 import { logger } from '../logger';
 
 // We look in database if the telegram user exists,

jobs/pending_payments.ts

@@ -5,7 +5,7 @@ import { Telegraf } from 'telegraf';
 import { I18nContext } from '@grammyjs/i18n';
 import { MainContext } from '../bot/start';
 const { payRequest, isPendingPayment } = require('../ln');
-const { getUserI18nContext } = require('../util');
+import { getUserI18nContext } from '../util';
 
 export const attemptPendingPayments = async (bot: Telegraf<MainContext>): Promise<void> => {
   const pendingPayments = await PendingPayment.find({

ln/subscribe_invoice.ts

@@ -6,7 +6,7 @@ const { payToBuyer } = require('./pay_request');
 import { lnd } from "./connect";
 import * as messages from '../bot/messages';
 const ordersActions = require('../bot/ordersActions');
-const { getUserI18nContext, getEmojiRate, decimalRound } = require('../util');
+import { getUserI18nContext, getEmojiRate, decimalRound } from '../util';
 import { logger } from '../logger';
 
 const subscribeInvoice = async (bot: Telegraf<MainContext>, id: string, resub: boolean) => {