* Added a basic compatibility test to compare bincode 1 and bincode 2 output
* Moved compatibility to the /compatibility/ crate, made bincode-derive support `#[bincode(crate = "bincode_2")]`
* Added decode/deserialize test to test_same
* Added random test cases to compatibility/src/sway.rs
* Added test for bincode_1::options().with_fixint_encoding() and bincode_2::config::legacy(). Added rand license
* Added comments on why the configs are chosen