chore: update ipfs (#43)

* chore: update ipfs

The next ipfs release will be a dual ESM/CJS version which is presenting
some interesting challenges for all the different tools used here.

We also use the `ipfs` module everywhere when we could be using `ipfs-core`
instead - it's lighter and much quicker to install.  Really we should only
use `ipfs` when we need the CLI and the HTTP RPC API, though I'm a little
wary of the potential confusion for new users having two options introduces.

Author: achingbrain

create-node.js

@@ -1,6 +1,6 @@
 'use strict'
 
-const IPFS = require('ipfs')
+const IPFS = require('ipfs-core')
 
 function createNode (options) {
   options = options || {}

package.json

@@ -14,7 +14,7 @@
   },
   "dependencies": {
     "@ipld/dag-pb": "^2.1.3",
-    "ipfs": "^0.58.1",
+    "ipfs-core": "^0.11.0",
     "ipld-ethereum": "^6.0.0",
     "ipld-format-to-blockcodec": "0.0.1",
     "ipld-git": "^0.6.1",