📦 Avoid multiple version of rc-xxx

[afc163]

antd master 上现在有两个 rc-tree，避免未来也打入两份，底层需要固定版本。

我另外发个 PR 到 3.0.x 上。

[vercel]

This pull request is being automatically deployed with ZEIT Now (learn more).
To see the status of your deployment, click below or on the icon next to each commit.

🔍 Inspect: https://zeit.co/react-component/tree-select/pqtghstq2
✅ Preview: https://tree-select-git-fix-bundle-size.react-component.now.sh

[codecov]

Codecov Report

Merging #228 into master will not change coverage by %.
The diff coverage is n/a.

@@           Coverage Diff           @@
##           master     #228   +/-   ##
=======================================
  Coverage   99.80%   99.80%           
=======================================
  Files          11       11           
  Lines         526      526           
  Branches      156      156           
=======================================
  Hits          525      525           
  Misses          1        1           

---

Continue to review full report at Codecov.

Legend - Click here to learn more
Δ = absolute <relative> (impact), ø = not affected, ? = missing data
Powered by Codecov. Last update 7b6ef8c...918b55b. Read the comment docs.

[zombieJ]

固定了以后，每次 rc-tree 更新都需要升级 rc-tree-select，感觉不是特别有必要。

[afc163]

如果 antd 中依赖的 rc-tree@~3.1.0，这里依赖了 rc-tree@^3.1.0，那么以后底层发了 rc-tree@3.2.0 之后，antd 里是不是会打包两个版本的 rc-tree ？

[zombieJ]

嗯，但是从更新度上看，rc-tree 发 minor 不是特别高。分叉还是比较少的。

[afc163]

先放着，以后遇到打包两份再说，之前以为打包超 300kb 是这个问题。