Transmission-rpc

Can't publish `3.0.0` on pypi, so releasing a new version.

Bug Fixes
- **client:** failed to add url which is http url but not end with 'torrent' ([16](https://github.com/Trim21/transmission-rpc/issues/16))

Code Refactoring
- return File object instead of returning a dict ([23](https://github.com/Trim21/transmission-rpc/issues/23))
- Client will use [`yarl`](https://github.com/aio-libs/yarl) to build url

BREAKING CHANGES

- `Torrent.files()` will return `List[File]`
`Client.get_files()` will return `Dict[int, List[File]]`
- Client args `address` and `user` is not available anymore

Features
- check rpc version for kwargs

Code Refactoring
- remove kwargs checker as a ValueError will be raised
- return File instead of return dict ([23](https://github.com/Trim21/transmission-rpc/issues/23))

BREAKING CHANGES

`Torrent.files()` will return `List[File]`
`Client.get_files()` will return `Dict[int, List[File]]`

Bug Fixes
- **client:** failed to add url which is http url but not end with 'torrent' (16)

Document:
- **client**: remove deprecated kwargs.

Code Refactoring
- Client will use yarl to build url

Features
- check rpc version for kwargs

BREAKING CHANGE

- Client take kwargs only
- Client args `address` and `user` is not avaliable anymore
- Drop python3.5 support