Issues about TypeScript definition

### Description

TypeScript definitions of many components are wrong.

### Reproduce Steps

For example, in [definition of `Input` component](https://github.com/eleme/element-react/blob/1af5231247b5b1b097a5135cf7d0c3e45b50c629/typings/index.d.ts#L437), you write
```
onChange?(e?: React.SyntheticEvent): void
```

in the real world, the component pass the string (value of input) to the `onChange` method, which should be
```
onChange?(value: string): void
```

Another case, `emptyText` is not present in attributes of `Table` components, which is present in your docs.

### Solution

Hopes there will be **a full check of all definition** and fix in TS .d.ts file. Or I may bring a pull request to fix the issues I ran into (which might be not complete)