Use measure-scrollbar locally instead of a dependency

So that Babel doesn’t become a dependency just for that (lib is using export).
Giving credit to original author.

src/components/picker.js

@@ -2,12 +2,11 @@ import '../vendor/raf-polyfill'
 
 import React from 'react'
 import PropTypes from 'prop-types'
-import measureScrollbar from 'measure-scrollbar'
 import data from '../data'
 
 import store from '../utils/store'
 import frequently from '../utils/frequently'
-import { deepMerge } from '../utils'
+import { deepMerge, measureScrollbar } from '../utils'
 
 import { Anchors, Category, Emoji, Preview, Search } from '.'
 

src/utils/index.js

@@ -163,11 +163,29 @@ function deepMerge(a, b) {
   return o
 }
 
+// https://github.com/sonicdoe/measure-scrollbar
+function measureScrollbar() {
+  const div = document.createElement('div')
+
+  div.style.width = '100px'
+  div.style.height = '100px'
+  div.style.overflow = 'scroll'
+  div.style.position = 'absolute'
+  div.style.top = '-9999px'
+
+  document.body.appendChild(div)
+  const scrollbarWidth = div.offsetWidth - div.clientWidth
+  document.body.removeChild(div)
+
+  return scrollbarWidth
+}
+
 export {
   getData,
   getSanitizedData,
   uniq,
   intersect,
   deepMerge,
-  unifiedToNative
+  unifiedToNative,
+  measureScrollbar
 }

yarn.lock

@@ -3879,10 +3879,6 @@ md5.js@^1.3.4:
     hash-base "^3.0.0"
     inherits "^2.0.1"
 
-measure-scrollbar@^1.0.0:
-  version "1.0.0"
-  resolved "https://registry.yarnpkg.com/measure-scrollbar/-/measure-scrollbar-1.0.0.tgz#a7b1019155671192c1a8587ea49669af4f75833d"
-
 media-typer@0.3.0:
   version "0.3.0"
   resolved "https://registry.yarnpkg.com/media-typer/-/media-typer-0.3.0.tgz#8710d7af0aa626f8fffa1ce00168545263255748"