Use v8-compile-cache to shave ~1/10 second off `typescript` load time

[cspotcode]

I've forked it: https://www.npmjs.com/package/v8-compile-cache-lib

We can use this solely for loading typescript, since we know it's big and will benefit.

We can't do something as simple as require('v8-compile-cache') because it's technically incompatible with certain types of code. We need to scope the usage to only our TS compiler loading.

Informal testing on my machine cuts ~80 to 100ms.

const v8CC = require('v8-compile-cache-lib').install();
const ts = require('typescript');
v8CC.uninstall();