Changelog of @hackage/syb 0.7.2.1

2021-01-18 Sergey Vinokurov serg.foo@gmail.com

* 0.7.2: Add compatibility with GHC 9, switch to tasty for tests,
fix tests on GHCJS

2019-06-15 Sergey Vinokurov serg.foo@gmail.com

* 0.7.1: Define recursive traversals in two parts, non-recursive
wrapper and recursive local helper to facilitate inlining and
avoid passing the same argument to all recursive calls