feat: convert to typescript (#1172)

Converts this module to typescript.

- Ecosystem modules renamed from (e.g.) `libp2p-tcp` to `@libp2p/tcp`
- Ecosystem module now have named exports
- Configuration has been updated, now pass instances of modules instead of classes:
- Some configuration keys have been renamed to make them more descriptive.  `transport` -> `transports`, `connEncryption` -> `connectionEncryption`.  In general where we pass multiple things, the key is now plural, e.g. `streamMuxer` -> `streamMuxers`, `contentRouting` -> `contentRouters`, etc.  Where we are configuring a singleton the config key is singular, e.g. `connProtector` -> `connectionProtector` etc.
- Properties of the `modules` config key have been moved to the root
- Properties of the `config` config key have been moved to the root
```js
// before
import Libp2p from 'libp2p'
import TCP from 'libp2p-tcp'

await Libp2p.create({
  modules: {
    transport: [
      TCP
    ],
  }
  config: {
    transport: {
      [TCP.tag]: {
        foo: 'bar'
      }
    },
    relay: {
      enabled: true,
      hop: {
        enabled: true,
        active: true
      }
    }
  }
})
```
```js
// after
import { createLibp2p } from 'libp2p'
import { TCP } from '@libp2p/tcp'

await createLibp2p({
  transports: [
    new TCP({ foo: 'bar' })
  ],
  relay: {
    enabled: true,
    hop: {
      enabled: true,
      active: true
    }
  }
})
```
- Use of `enabled` flag has been reduced - previously you could pass a module but disable it with config.  Now if you don't want a feature, just don't pass an implementation.   Eg:
```js
// before
await Libp2p.create({
  modules: {
    transport: [
      TCP
    ],
    pubsub: Gossipsub
  },
  config: {
    pubsub: {
      enabled: false
    }
  }
})
```
```js
// after
await createLibp2p({
  transports: [
    new TCP()
  ]
})
```
- `.multiaddrs` renamed to `.getMultiaddrs()` because it's not a property accessor, work is done by that method to calculate announce addresses, observed addresses, etc
- `/p2p/${peerId}` is now appended to all addresses returned by `.getMultiaddrs()` so they can be used opaquely (every consumer has to append the peer ID to the address to actually use it otherwise).  If you need low-level unadulterated addresses, call methods on the address manager.

BREAKING CHANGE: types are no longer hand crafted, this module is now ESM only

examples/pnet/libp2p-node.js

@@ -1,38 +1,31 @@
-'use strict'
-
-const Libp2p = require('libp2p')
-const TCP = require('libp2p-tcp')
-const MPLEX = require('libp2p-mplex')
-const { NOISE } = require('@chainsafe/libp2p-noise')
-const Protector = require('libp2p/src/pnet')
+import { createLibp2p } from 'libp2p'
+import { TCP } from '@libp2p/tcp'
+import { Mplex } from '@libp2p/mplex'
+import { Noise } from '@chainsafe/libp2p-noise'
+import { PreSharedKeyConnectionProtector } from 'libp2p/pnet'
 
 /**
  * privateLibp2pNode returns a libp2p node function that will use the swarm
  * key with the given `swarmKey` to create the Protector
- *
- * @param {Uint8Array} swarmKey
- * @returns {Promise<libp2p>} Returns a libp2pNode function for use in IPFS creation
  */
-const privateLibp2pNode = async (swarmKey) => {
-  const node = await Libp2p.create({
+export async function privateLibp2pNode (swarmKey) {
+  const node = await createLibp2p({
     addresses: {
       listen: ['/ip4/0.0.0.0/tcp/0']
     },
-    modules: {
-      transport: [TCP], // We're only using the TCP transport for this example
-      streamMuxer: [MPLEX], // We're only using mplex muxing
-      // Let's make sure to use identifying crypto in our pnet since the protector doesn't
-      // care about node identity, and only the presence of private keys
-      connEncryption: [NOISE],
-      // Leave peer discovery empty, we don't want to find peers. We could omit the property, but it's
-      // being left in for explicit readability.
-      // We should explicitly dial pnet peers, or use a custom discovery service for finding nodes in our pnet
-      peerDiscovery: [],
-      connProtector: new Protector(swarmKey)
-    }
+    transports: [new TCP()], // We're only using the TCP transport for this example
+    streamMuxers: [new Mplex()], // We're only using mplex muxing
+    // Let's make sure to use identifying crypto in our pnet since the protector doesn't
+    // care about node identity, and only the presence of private keys
+    connectionEncryption: [new Noise()],
+    // Leave peer discovery empty, we don't want to find peers. We could omit the property, but it's
+    // being left in for explicit readability.
+    // We should explicitly dial pnet peers, or use a custom discovery service for finding nodes in our pnet
+    peerDiscovery: [],
+    connectionProtector: new PreSharedKeyConnectionProtector({
+      psk: swarmKey
+    })
   })
 
   return node
 }
-
-module.exports = privateLibp2pNode