docs(input): fix input type knob

src/components/input/stories/helpers.ts

@@ -1,7 +1,7 @@
 /**
  * @license
  *
- * Copyright IBM Corp. 2019, 2020
+ * Copyright IBM Corp. 2019, 2022
  *
  * This source code is licensed under the Apache-2.0 license found in the
  * LICENSE file in the root directory of this source tree.
@@ -10,21 +10,20 @@
 import { action } from '@storybook/addon-actions';
 import { INPUT_COLOR_SCHEME, INPUT_SIZE, INPUT_TYPE } from '../input';
 
-const inputTypes = {};
+const inputTypes = Object.entries(INPUT_TYPE).reduce(
+  (acc, [key, val]) => ({
+    ...acc,
+    [`${key.toLowerCase()}`]: val,
+  }),
+  {}
+);
 
 const sizes = {
   Regular: null,
   [`Small size (${INPUT_SIZE.SMALL})`]: INPUT_SIZE.SMALL,
   [`Extra large size (${INPUT_SIZE.EXTRA_LARGE})`]: INPUT_SIZE.EXTRA_LARGE,
 };
 
-const keys = Object.keys(INPUT_TYPE);
-for (let i = 0; i < keys.length; i++) {
-  const key = keys[i];
-  const value = keys[key];
-  inputTypes[key.toLowerCase()] = value;
-}
-
 const colorSchemes = {
   [`Regular`]: null,
   [`Light (${INPUT_COLOR_SCHEME.LIGHT})`]: INPUT_COLOR_SCHEME.LIGHT,