p2tr test vectors

• BIP-0341 (P2TR) test vectors for this project can be found here.

• run all tests

  $ cargo test

• run a specific test:

  $ cargo test basic_p2tr_no_script_tree -- --nocapture
  $ cargo test p2tr_single_leaf_script -- --nocapture
  $ cargo test p2tr_single_leaf_alternative -- --nocapture
  $ cargo test p2tr_two_leaf_non_standard_leaf_version -- --nocapture
  $ cargo test p2tr_two_leaf_taproot -- --nocapture
  $ cargo test p2tr_three_leaf_complex -- --nocapture
  $ cargo test p2tr_three_leaf_alternative -- --nocapture