2022.06.19_12-44

Upgrade to TypeScript 4.7 and lock TS minor version

TS releases aren't completely backwards-compatible so locking on minor
version to make sure all upgrades are intentional.

Also update tsconfig options a bit. Module is now the stable 'ES2022'
value instead of 'esnext' which changes between TS versions. Target
and lib are now 'ES2021' since new-tab is only run on modern browsers.

Also bump Prettier version.

2022.03.28_10-00

Use default value for getting BALANCE_FETCH_TIME from localStorage

Previously, it returned undefined if there was no value present in
localStorage. This was converted to NaN by Number() which the following
lines didn't account for.

This fixes balances not being fetched if opening the project for the
first time.

2022.02.27_15-21

Use overloaded function for getFromLocalStorage type

This allows clients to not provide a default value, in which case
undefined is returned they must explicitly handle it.

Also move a CSS import from App.tsx to index.tsx

2022.02.27_10-37

Add instructions to README about setup through downloading a release