v0.13.0 Style::new() function error

[arthasyou]

I follow the example as bellow
use stylist::Style;

let style = Style::new("background-color: red;")?;

the error is:

the trait bound StyleSource: From<&str> is not satisfied
the trait From<Sheet> is implemented for StyleSource
required for &str to implement Into<StyleSource>
required for StyleSource to implement TryFrom<&str>

[WorldSEnder]

The example shown in the "Runtime Style" section of the README depends on enabling the parser feature. I suppose this should be made clear. Prefer the macros generally, due to lower runtime overhead.