Update dependencies (escept Demitasse)

Brings all dependencies (except Demitasse) up to latest. I mainly did
this now to get TS 4.4 which includes some significant improvements
to type inference based on upstream code. It will also quiet those
security warnings.

Also adds a new package.json script to make updating deps easier in the
future. Now you can run `npm run update` which runs `npm-check-updates`
which will update all non-Demitasse deps in package.json. Just remember
to run `npm i` afterwards to actually install the new deps!

Also re-ran prettier on all files, which resulted in one minor change.

Author: justingrant

lib/intrinsicclass.ts

@@ -25,9 +25,9 @@ type customFormatFunction<T> = (
   depth: number,
   options: { stylize: (value: unknown, type: 'number' | 'special') => string }
 ) => string;
-const customUtilInspectFormatters: Partial<
-  { [key in keyof TemporalIntrinsicRegistrations]: customFormatFunction<TemporalIntrinsicRegistrations[key]> }
-> = {
+const customUtilInspectFormatters: Partial<{
+  [key in keyof TemporalIntrinsicRegistrations]: customFormatFunction<TemporalIntrinsicRegistrations[key]>;
+}> = {
   ['Temporal.Duration'](depth, options) {
     const descr = options.stylize(`${this[Symbol.toStringTag]} <${this}>`, 'special');
     if (depth < 1) return descr;