修复: 解决 webpack-theme-color-replacer 导致的IE 兼容性问题；

src/utils/themeUtil.js

@@ -1,4 +1,4 @@
-const ThemeColorReplacer = require('webpack-theme-color-replacer')
+const varyColor = require('webpack-theme-color-replacer/client/varyColor')
 const client = require('webpack-theme-color-replacer/client')
 const generate =  require('@ant-design/colors/lib/generate').default
 const themeColor = require('../config').themeColor
@@ -7,10 +7,10 @@ module.exports = {
   primaryColor: themeColor,
   getThemeColors(color) {
     const lightens = new Array(9).fill().map((t, i) => {
-      return ThemeColorReplacer.varyColor.lighten(color, i / 10)
+      return varyColor.lighten(color, i / 10)
     })
     const palettes = generate(color)
-    const rgb = ThemeColorReplacer.varyColor.toNum3(color.replace('#', '')).join(',')
+    const rgb = varyColor.toNum3(color.replace('#', '')).join(',')
     return palettes.concat(lightens).concat(rgb)
   },
   changeThemeColor (newColor) {