remove allowSyntheticDefaultImports

[doxiaodong]

see ant-design/ant-design-mobile#2507

[coveralls]

Coverage remained the same at 54.774% when pulling 186f3c4 on typings into c11b93c on master.

[doxiaodong]

1. @types/react-native 和 @types/node, lib.es6 的类型定义存在重复，参考 @types/react-native definitions for global and require conflict with @types/node DefinitelyTyped/DefinitelyTyped#16825

2. 需不需要把 @types/react 等写进 peerDependencies

[paranoidjk]

这个问题所有用到 rn 的库都有，可以统一看下解决掉 react-component/swipeout@fd1e7b5

[doxiaodong]

@yesmeck babel-runtime 依赖都改了，然后 @types/classnames 并没有 default 导出，所以我还是觉得写成 import * as classname from 'classnames' 比较好, https://github.com/DefinitelyTyped/DefinitelyTyped/blob/master/types/classnames/index.d.ts

[yesmeck]

@doxiaodong ok