Add release wizard

tools/update-changelog.js

@@ -1,16 +1,19 @@
-#!/usr/bin/env node
-
 const updateChangelog = require('basic-changelog')
 
 const opts = {
   filterCommitsStartingWith: ['release:']
 }
 
-updateChangelog('./CHANGELOG.md', opts, err => {
-  if (err) {
-    console.error('Something went wrong trying to update the changelog:')
-    console.error(err)
-    return
-  }
-  console.log('Changelog successfully updated')
-})
+module.exports = () => {
+  return new Promise((resolve, reject) => {
+    updateChangelog('./CHANGELOG.md', opts, err => {
+      if (err) {
+        console.error('Something went wrong trying to update the changelog:')
+        reject(err)
+        return
+      }
+      console.log('Changelog successfully updated')
+      resolve()
+    })
+  })
+}