adding webpack 5

[luu-alex]

Description

(#5629) Webpack 4 -> Webpack 5:
As well an update to webpack, the build size has been made smaller with optimizations in webpack configs.
Packages were added to dev-dependencies due to breaking changes upgrading to webpack 5

previously: 1.39mb

current: 1.31mb

edit: was able to improve and now 1.12-1.13mb

Type of change

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)

Checklist for 1.x:

• I have selected the correct base branch.
• I have performed a self-review of my own code.
• I have commented my code, particularly in hard-to-understand areas.
• I have made corresponding changes to the documentation.
• My changes generate no new warnings.
• Any dependent changes have been merged and published in downstream modules.
• I ran npm run dtslint with success and extended the tests and types if necessary.
• I ran npm run test:cov and my test cases cover all the lines and branches of the added code.
• I ran npm run build with success.
• I have tested the built dist/web3.min.js in a browser.
• I have tested my code on the live network.
• I have checked the Deploy Preview and it looks correct.
• I have updated the CHANGELOG.md file in the root folder.

Checklist for 4.x:

• I have selected the correct 4.x base branch.
• Within the description, the feature or issue is discussed in detail or an issue is linked.
• I have performed a self-review of my own code
• I have commented my code, particularly in hard-to-understand areas.
• I have added any required tests for the changes I made
• I have made corresponding changes to the documentation
• Any dependent changes have been merged and published in downstream modules.
• I ran yarn successfully
• I ran yarn lint successfully
• I ran yarn build:web successfully
• I ran yarn test:unit successfully
• I ran yarn test:integration successfully
• I ran compile:contracts successfully
• I have tested my code.
• I have updated the corresponding CHANGELOG.md file in the packages I have edited.

[coveralls]

Pull Request Test Coverage Report for Build 3525432817

Warning: This coverage report may be inaccurate.

This pull request's base commit is no longer the HEAD commit of its target branch. This means it includes changes from outside the original pull request, including, potentially, unrelated coverage changes.

• For more information on this, see Tracking coverage changes with pull request builds.
• To avoid this issue with future PRs, see these Recommended CI Configurations.
• For a quick fix, rebase this PR at GitHub. Your next report should be accurate.

Details

• 1 of 1 (100.0%) changed or added relevant line in 1 file are covered.
• No unchanged relevant lines lost coverage.
• Overall coverage remained the same at 74.573%

---

Totals
Change from base Build 3517769346:	0.0%
Covered Lines:	3282
Relevant Lines:	4146

---

💛 - Coveralls

[avkos]

You have some problems with encrypt/decrypt the wallet in tests. Can it be related to webpack config?

[luu-alex]

@avkos yes, a browser test was failing due to the upgrade. its passing now

[luu-alex]

new webpack now produces a web3.min.js.lincese.txt

/*
object-assign
(c) Sindre Sorhus
@license MIT
*/

/*!
 * @overview es6-promise - a tiny implementation of Promises/A+.
 * @copyright Copyright (c) 2014 Yehuda Katz, Tom Dale, Stefan Penner and contributors (Conversion to ES6 API by Jake Archibald)
 * @license   Licensed under MIT license
 *            See https://raw.githubusercontent.com/stefanpenner/es6-promise/master/LICENSE
 * @version   v4.2.8+1e68dce6
 */

/*!
 * The buffer module from node.js, for the browser.
 *
 * @author   Feross Aboukhadijeh <[email protected]> <http://feross.org>
 * @license  MIT
 */

/*!
 * The buffer module from node.js, for the browser.
 *
 * @author   Feross Aboukhadijeh <http://feross.org>
 * @license  MIT
 */

/*!
 * v2.1.4-104-gc868b3a
 * 
 */

/*! https://mths.be/utf8js v3.0.0 by @mathias */

/*! ieee754. BSD-3-Clause License. Feross Aboukhadijeh <https://feross.org/opensource> */

/*! regenerator-runtime -- Copyright (c) 2014-present, Facebook, Inc. -- license (MIT): https://github.com/facebook/regenerator/blob/main/LICENSE */

/*! safe-buffer. MIT License. Feross Aboukhadijeh <https://feross.org/opensource> */

/**
 * [js-sha3]{@link https://github.com/emn178/js-sha3}
 *
 * @version 0.5.7
 * @author Chen, Yi-Cyuan [[email protected]]
 * @copyright Chen, Yi-Cyuan 2015-2016
 * @license MIT
 */

/**
 * [js-sha3]{@link https://github.com/emn178/js-sha3}
 *
 * @version 0.8.0
 * @author Chen, Yi-Cyuan [[email protected]]
 * @copyright Chen, Yi-Cyuan 2015-2018
 * @license MIT
 */

Its an MIT license for some modules, it looks ok to keep