fix: access process from globalThis (#348)

Fixes webpack error: ``` Module not found: Error: Can't resolve 'process/browser' in /path/... ``` Falls back to `setImmediate`, then `setTimeout`.

Author: achingbrain

packages/ipfs-repo/src/idstore.js

@@ -67,7 +67,7 @@ export function createIdStore (store) {
 
  // process.nextTick runs on the microtask queue, setImmediate runs on the next
  // event loop iteration so is slower. Use process.nextTick if it is available.
- const runner = process && process.nextTick ? process.nextTick : setImmediate
+ const runner = globalThis.process && globalThis.process.nextTick ? globalThis.process.nextTick : (globalThis.setImmediate || globalThis.setTimeout)
 
  runner(async () => {
  try {