v0.5.22

• Added ExprMatcher, and constructor(s) expr_matcher and ExprMatcher::new. This can be used to parse an expression once and re-used it to run multiple matches_keys against different keys:

    let matcher = substreams::expr_matcher(&query);
  
    transactions.flat_map(|trx| {
        trx.instructions()
            .filter(|view| matcher.matches_keys(&vec![format!("program:{}", view.program_id().to_string())]))
    });