Add touch device support using Pointer Events API

[draedful]

Problem

Currently, the graph only supports mouse events, making it useless on touch devices.

Solution

Add touch device support using the Pointer Events API.

Plan

1. Add listening pointer events:
   • In src/components/canvas/graph/index.ts, add listening events: [pointerdown, pointermove, pointerup, pointerleave]. Emit same mouse event on fire these events.
2. replace listening mouse-events for pointer event in Core-Component.
3. Mark mouse-events like an deprecated

https://w3c.github.io/pointerevents/#the-pointermove-event

[draedful]

While looking at the current way of doing things, it turned out to be more complicated than it seemed at first. You need to not just listen to the two fingers but also guess what they're going to do next. Plus, actions like tapping, pinching, and dragging can happen at the same time, which can get confusing.

For this reason, it's better to use a ready-made solution.

There are many ready-made solutions out there, but they all have the same problem — they don't work well with touch. The most popular one is called hammer.js. It has many forks, and you can choose any of them. 

[draedful]

In #92 we support dblick. So in this issues we have

In a PR #92, we support double-clicking event on graph. But, before the dbclick-event fired two separate click-events.
We plan to fix it in this issue.

[draedful]

Camera panning should not block page scrolling #96