在<csselement>上运行.getAttribute（）命令时发生错误：TypeError：_this2.client.assertion不是函数

Question

在创建夜班测试时，我使用了waitForAttribute()，它适用于nightwatch@0.9.0。但是当我尝试升级到nightwatch@1.0.6时，它会出现以下错误：

An error occurred while running .getAttribute() command on <.csselement>: TypeError: _this2.client.assertion is not a function
  at /node_modules/nightwatch-custom-commands-assertions/js/commands/waitForAttribute.js:100:19
  at NightwatchAPI.<anonymous> (.../node_modules/nightwatch-custom-commands-assertions/js/commands/waitForAttribute.js:117:13)
  at transport.locateElement.then.then.result (../node_modules/nightwatch/lib/api-loader/element-command.js:107:23)
  at <anonymous>
  at process._tickCallback (internal/process/next_tick.js:188:7)
   at <anonymous>
   at process._tickCallback (internal/process/next_tick.js:188:7)
   at <anonymous>
   at process._tickCallback (internal/process/next_tick.js:188:7)