Test migration to jest by hand

Apparently using regular expressions is way easier.

test/hashNode/hashNode.js

@@ -0,0 +1,15 @@
+const crypto = require('crypto');
+const hashNode = val =>
+new Promise(resolve =>
+setTimeout(
+() =>
+resolve(
+crypto
+.createHash('sha256')
+.update(val)
+.digest('hex')
+),
+0
+)
+);
+module.exports = hashNode;