Default way to set default attrs for component isn't working

[AlxGolubev]

🐛 Bug Report

Styled-components allow you to set default props for a component using .attrs() method.
Right now, after migrating to xstyled wrapper I was had to rewrite all my components like e.g.

const PasswordInput = styled(Component).attrs({ type: 'password' })`` 

to

const PasswordInput = styled(Component)``
PasswordInput.attrs = [{ type: 'password' }]

To Reproduce

1. Create a styled component
2. Try to pass attributes to the component in a way proposed in https://www.styled-components.com/docs/faqs#when-to-use-attrs

You'll get Object(...)(...).attrs is not a function

Expected behavior

It should work in the same way as it proposed in a documentation of a styled-components package

Link to repl or repo (highly encouraged)

https://codesandbox.io/s/festive-dhawan-rn2yw?fontsize=14 (you'll have to download the code and run on your local machine, cuz codesandbox have some troubles with your package while it's perfectly working on a local server)

Paste the results here:

npx: installed 1 in 2.141s

*** Clipboard option removed - use clipboardy or clipboard-cli directly ***


## System:
 - OS: macOS 10.14.4
 - CPU: (8) x64 Intel(R) Core(TM) i7-4770HQ CPU @ 2.20GHz
 - Memory: 58.19 MB / 16.00 GB
 - Shell: 5.3 - /bin/zsh
## Binaries:
 - Node: 11.13.0 - ~/.nenv/shims/node
 - Yarn: 1.15.2 - /usr/local/bin/yarn
 - npm: 6.7.0 - ~/.nenv/shims/npm
## npmPackages:
 - @xstyled/styled-components: 1.0.1 => 1.0.1 
 - styled-components: 4.2.0 => 4.2.0