Remove unnecessary clones and allocations.

[ryanavella]

This should reduce the number of allocations to just N+O(1) the minimum overhead required for parsing JSON.

One more allocation can be removed with a breaking change so I haven't included that change here, but the signature of stop_words::get could easily be changed to accept a AsRef<str> instead of a Into<String>.

rust-stop-words/src/lib.rs

Line 18 in 66711b9

pub fn get<T: Into<String>>(input_language: T) -> Vec<String> {

[cmccomb]

Thanks for the PR!