Add ansi color to jenkins pipeline

Jenkinsfile

+#!/usr/bin/env bash
 pipeline {
   agent any
   stages {
         }
         stage('Run IOS tests') {
           steps {
+          ansiColor('xterm') {
             sh '''#!/bin/bash
 
 npm run test-unit-ios -- --release
 npm run test-e2e-ios -- --release'''
           }
+         }
         }
         stage('Run android tests') {
           steps {