docs: update examples (ipfs#2319)

Since I was going through these anyway to ensure they work with [0.37](ipfs#2192) I've updated the examples to use the new [`IPFS.create` constructor](https://github.com/ipfs/js-ipfs#ipfs-constructor) and switched to using the promised API so that we onboard new users to using promises and minimise the disruption caused when ipfs#1670 bubbles up to here.

License: MIT
Signed-off-by: Alan Shaw <[email protected]>

Author: Alan Shaw

package.json

@@ -5,7 +5,7 @@
   "dependencies": {
     "dot-prop": "^5.0.0",
     "ipfs": "file:../../",
-    "ipfs-css": "^0.12.0",
+    "ipfs-css": "^0.13.1",
     "react": "^16.8.0",
     "react-dom": "^16.8.0",
     "react-scripts": "3.0.1",

src/hooks/use-ipfs-factory.js

@@ -40,7 +40,7 @@ export default function useIpfsFactory ({ commands }) {
     } else {
       try {
         console.time('IPFS Started')
-        ipfs = await promiseMeJsIpfs(Ipfs, {})
+        ipfs = await Ipfs.create()
         console.timeEnd('IPFS Started')
       } catch (error) {
         console.error('IPFS init error:', error)
@@ -54,11 +54,3 @@ export default function useIpfsFactory ({ commands }) {
 
   return { ipfs, isIpfsReady, ipfsInitError }
 }
-
-function promiseMeJsIpfs (Ipfs, opts) {
-  return new Promise((resolve, reject) => {
-    const ipfs = new Ipfs(opts)
-    ipfs.once('ready', () => resolve(ipfs))
-    ipfs.once('error', err => reject(err))
-  })
-}