Changelog for exact-real-0.12.5.1

Change Log

WIP

[0.12.5.1] - 2021-12-13

[0.12.5] - 2021-05-29

[0.12.4.1] - 2020-11-01

[0.12.4] - 2020-06-07

Big thanks for @Zemyla for the new memoization scheme

[0.12.3] - 2020-05-29