fix: remove node global (#587)

* fix: use new libp2p-crypto

* fix: remove node globals and reduce size

- adds buffer require
- adds globalThis where needed
- streaming-iterables was remove and new utils created, this will be consolidated in `ipfs-utils` and backported here to normalize all these iterator helper functions
- latency-monitor was copied inside the repo
- iso-random-stream is now used instead of node crypto
- the test `should ignore self on discovery` was moved to node only

Size: 172.97KB
47.03KB below the 220KB limit.

`aegir build --node false` and `aegir test -t browser --node false` now work 🎉

* fix: fix require path

* fix: feedback

* fix: update deps and bundle size

* chore: bump interfaces

* chore: update size

src/index.js

@@ -2,6 +2,7 @@
 
 const { EventEmitter } = require('events')
 const debug = require('debug')
+const globalThis = require('ipfs-utils/src/globalthis')
 const log = debug('libp2p')
 log.error = debug('libp2p:error')
 
@@ -142,7 +143,7 @@ class Libp2p extends EventEmitter {
     // Attach private network protector
     if (this._modules.connProtector) {
       this.upgrader.protector = this._modules.connProtector
-    } else if (process.env.LIBP2P_FORCE_PNET) {
+    } else if (globalThis.process !== undefined && globalThis.process.env && globalThis.process.env.LIBP2P_FORCE_PNET) {
       throw new Error('Private network is enforced, but no protector was provided')
     }