Description

This PR refactors and optimizes randomBytes().

• For browser or web worker environment, use window.crypto.getRandomValues()
• For node environment, we use sodium-native to generate random bytes safely
• by dropping sodium-universal, we can minimize dependency and the bundle size (32kb -> 1.3kb when Minified + Gzipped) and still support web worker environment.
• handles the limit of getRandomValues() which is about the requested length.
• supports IE 11

Also, this PR upgrades @types/node & prettier and formats codes in order to use optional chaining without errors.

References

• https://github.com/sodium-friends/sodium-javascript/blob/master/randombytes.js
• https://github.com/crypto-browserify/randombytes/blob/master/browser.js
• https://github.com/flexdinesh/browser-or-node
• https://paragonie.com/blog/2016/05/how-generate-secure-random-numbers-in-various-programming-languages#nodejs-csprng
• https://paragonie.com/blog/2016/05/how-generate-secure-random-numbers-in-various-programming-languages#js-csprng

Motivation and Context

How has this been tested?

Screenshots (if appropriate):

Types of changes

• 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:

• Add tests to cover changes as needed.
• Update documentation as needed.