Old Android versions and Template7 problem

Questions
1

Hi
I need to my framework7-vue/cordova app works on android 4.4 and on so i guess i should work with F7 v3 right?
But which version exactly(3.?.?) . because no matter which F7 version I use it always installs Template7 1.4.1 which uses new template literals and some es6 features that android 4.4 webview doesn’t understand!
I’ve got errors at escape(string = '') {... or at part += ` ${helperParts[j]}` …
I’ve already managed to use babel to transpile es6 functions into compatible ones but i can’t figure out how to make it work on template literals.

// babel.config.js
module.exports = {
	presets: [
       [
            '@babel/preset-env',
            {
                 modules: false,
                 useBuiltIns: 'usage'
            }
       ]
  ],
  plugins: ['@babel/plugin-transform-template-literals']
}

So how could I manage to my app works on old android devices?

update :
After more digging I’ve found in Temple7 folder in node_modules there is a template7.esm.js with new es6 features and template7.js with common javascript codes. But webpack includes esm bundle into the chunk:

...
"use strict";
/* WEBPACK VAR INJECTION */(function(global) {/**
 * Template7 1.4.1
 * Mobile-first HTML template engine
 * 
 * http://www.idangero.us/template7/
 * 
 * Copyright 2019, Vladimir Kharlampidi
 * The iDangero.us
 * http://www.idangero.us/
 * 
 * Licensed under MIT
 * 
 * Released on: February 5, 2019
 */

let t7ctx;
if (typeof window !== 'undefined') {
  t7ctx = window;
} else if (typeof global !== 'undefined') {
  t7ctx = global;
} else {
  t7ctx = undefined;
}

const Template7Context = t7ctx;

const Template7Utils = {
  quoteSingleRexExp: new RegExp('\'', 'g'),
  quoteDoubleRexExp: new RegExp('"', 'g'),
  isFunction(func) {
    return typeof func === 'function';
  },
  escape(string = '') {
    return string
      .replace(/&/g, '&')
      .replace(/</g, '&lt;')
      .replace(/>/g, '&gt;')
      .replace(/"/g, '&quot;')
      .replace(/'/g, '&#039;');
  },
...
2

Babel preset env has targets option where you need to specify what platform/browser you are targeting and it will transpile template literals as well https://babeljs.io/docs/en/babel-preset-env#targets