Add node modules and new code for release (#57)

Co-authored-by: taakleton <taakleton@users.noreply.github.com>

node_modules/universalify/index.js

@@ -0,0 +1,25 @@
+'use strict'
+
+exports.fromCallback = function (fn) {
+  return Object.defineProperty(function () {
+    if (typeof arguments[arguments.length - 1] === 'function') fn.apply(this, arguments)
+    else {
+      return new Promise((resolve, reject) => {
+        arguments[arguments.length] = (err, res) => {
+          if (err) return reject(err)
+          resolve(res)
+        }
+        arguments.length++
+        fn.apply(this, arguments)
+      })
+    }
+  }, 'name', { value: fn.name })
+}
+
+exports.fromPromise = function (fn) {
+  return Object.defineProperty(function () {
+    const cb = arguments[arguments.length - 1]
+    if (typeof cb !== 'function') return fn.apply(this, arguments)
+    else fn.apply(this, arguments).then(r => cb(null, r), cb)
+  }, 'name', { value: fn.name })
+}