refactor: remove micro-util dependencies

engine.js

@@ -1,8 +1,6 @@
 'format cjs';
 
 var wrap = require('word-wrap');
-var map = require('lodash.map');
-var longest = require('longest');
 var chalk = require('chalk');
 
 var filter = function(array) {
@@ -33,16 +31,27 @@ var filterSubject = function(subject, disableSubjectLowerCase) {
   return subject;
 };
 
+/**
+ * @param input {string[]}
+ * @return {number}
+ */
+function getLongestLength(input) {
+  var longest = Object.keys(input).reduce(function(maxLength, key) {
+    return Math.max(maxLength, key.length);
+  }, 0);
+
+  return longest + 1;
+}
+
 // This can be any kind of SystemJS compatible module.
 // We use Commonjs here, but ES6 or AMD would do just
 // fine.
 module.exports = function(options) {
-  var types = options.types;
-
-  var length = longest(Object.keys(types)).length + 1;
-  var choices = map(types, function(type, key) {
+  var keys = Object.keys(options.types);
+  var length = getLongestLength(keys);
+  var choices = keys.map(function(key) {
     return {
-      name: (key + ':').padEnd(length) + ' ' + type.description,
+      name: (key + ':').padEnd(length) + ' ' + options.types[key].description,
       value: key
     };
   });

package.json

@@ -24,8 +24,6 @@
     "chalk": "^4.1.2",
     "commitizen": "^4.3.1",
     "conventional-commit-types": "^3.0.0",
-    "lodash.map": "^4.6.0",
-    "longest": "^2.0.1",
     "word-wrap": "^1.2.5"
   },
   "devDependencies": {