LG-3756: Bump Node devDependencies to latest

[aduth]

Why: As a user, I want login.gov to not have unused or out of date apps, so that I can use the fastest and most secure app possible.

This only updates devDependencies, under the assumption that they are generally less risky. They are not immune to risk, given that some devDependencies are responsible for generating runtime code (e.g. Babel, Webpack, etc).

Using ncu:

$ ncu --dep dev   
Checking /Users/andrewmduthie/Documents/Code/identity-idp/package.json
[====================] 32/32 100%

All dependencies match the latest package versions :)

Notable major version bumps:

 @types/react                  ^16.9.56  →   ^17.0.0   
 chai                            ^3.5.0  →    ^4.2.0   
 dirty-chai                      ^1.2.2  →    ^2.0.1 

• @types/react brings TypeScript definitions in line with React 17 (see Upgrade React from 16.13.1 to 17.0.1 #4362).
• The Chai release brings some breaking changes, resolved here.

[mitchellhenke]

👍🏼

[aduth]

Pretty sure this was always broken, since the buffer here is not actually "credential123", it's "credential12":

window.btoa(String.fromCharCode(...new Uint8Array([114, 183, 157, 122, 123, 98, 106, 93, 118])))
// "credential12"

This is clearer anyways.

This became a failure in upgrading chai, likely related to release notes concerning deep equality revisions.

[zachmargolis]

LGTM