The way Filter is currently defined

#[derive(Clone)]
pub struct Filter {
    pub p: Vec<&'static str>,
    pub g: Vec<&'static str>,
}

makes it impossible to filter dynamically since the values must be known at compile time. Could we change the definition to:

#[derive(Clone)]
pub struct Filter<'a> {
    pub p: Vec<&'a str>,
    pub g: Vec<&'a str>,
}

assuming the code compiles with the new definition would you accept a PR?