新增: 增加动态修改主题色功能；

src/utils/themeUtil.js

@@ -0,0 +1,17 @@
+import client from 'webpack-theme-color-replacer/client'
+import generate from '@ant-design/colors/lib/generate'
+
+export default {
+  primaryColor: '#1890ff',
+  changeThemeColor (newColor) {
+    let lastColor = this.lastColor || this.primaryColor
+    let options = {
+      cssUrl: '/css/theme-colors.css',
+      oldColors: generate(lastColor),
+      newColors: generate(newColor)
+    }
+    let promise = client.changer.changeColor(options)
+    this.lastColor = lastColor
+    return promise
+  }
+}