Latest version `cssparser_color-0.1.0` does not depend on `cssparser-0.34`

[eckz]

Summary

Right now latest version of cssparser_color (0.1.0) depends on cssparser-0.33.

This wouldn't be a massive issue, because I could downgrade the previous version,
but selectors depends on cssparser-0.34 too, and previous version of selectors depends on much older version, making it really difficult to use three crates at the same time.

How to fix

I think publishing a new version of cssparser_color that depends on cssparser-0.34 should fix the issue.

[mrobinson]

@emilio Would you be able to release a new version of cssparser_color as well?

[emilio]

@mrobinson wanna review #395? :)

[emilio]

Should be fixed now.