@antv/g-base@0.2.0

• 🌟 Add emitDelegation method for Element. #274
• 🌟 Add findAllByName function for Group. #301
• 🌟 Add getRenderer() method for Canvas to get current rendering engine. #302
• 🌟 Add getCursor() and setCursor(cursor) method for Canvas to get and set cursor style of canvas. #319

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• 🌟 Element 新增 emitDelegation 成员方法。#274
• 🌟 Group 上新增成员函数 findAllByName。#301
• 🌟 Canvas 新增 getRenderer() 成员方法属性，用来获取当前的渲染引擎。#302
• 🌟[g-base] Canvas 上新增 getCursor() and setCursor(cursor) 方法，用于获取和设置画布的 cursor 样式。#319