更新组件演示页面，方便用户直接使用组件，去除tn-button的默认背景色，tn-avatar修改参数默认值，修复tn-avatar-group最开始头像进行了偏移、修复无法使用标签的bug，tn-badge修改参数默认值，tn-collapse-item修复背景颜色失效问题，滚动通知移除默认背景颜色和字体大小，tn-count-down修复时间单位不正确问题，列表组件修复背景颜色问题，tn-nav-bar返回按钮修改为可进行修改的图标，tn-step添加点击步骤进行跳转，tn-loading修复默认激活颜色出错问题，tn-tag移除默认背景颜色，优化阴影大小css

pages/tuniao/tuniao.vue

@@ -57,15 +57,6 @@
             <view class="tn-margin-left-sm tn-color-cyan tn-icon-link"></view>
           </view>
         </tn-list-cell>
-        <tn-list-cell :hover="true" :unlined="true" :radius="true" :fontSize="30" @click="navTuniaoUI">
-          <view class="tn-flex tn-flex-col-center">
-            <view class="icon1__item--icon tn-flex tn-flex-row-center tn-flex-col-center tn-cool-bg-color-16 tn-color-white" > 
-              <view class="tn-icon-vip-fill"></view>
-            </view>
-            <view class="tn-margin-left-sm tn-flex-1">图鸟UI</view>
-            <view class="tn-margin-left-sm tn-color-orangeyellow">会员版</view>
-          </view>
-        </tn-list-cell>
         <tn-list-cell :hover="true" :unlined="true" :radius="true" :fontSize="30" @click="copyGitee">
           <view class="tn-flex tn-flex-col-center">
             <view class="icon1__item--icon tn-flex tn-flex-row-center tn-flex-col-center tn-cool-bg-color-1 tn-color-white"> 
@@ -160,12 +151,6 @@
           appId: 'wxa698b1eee960632f'
         })
       },
-      // 跳转到图鸟UI会员版
-      navTuniaoUI() {
-        uni.navigateToMiniProgram({
-          appId: 'wxf3d81a452b88ff4b'
-        })
-      },
       
       // 跳转到会员协议
       navPlus() {