Update CHANGELOG

Author: adamwathan

CHANGELOG.md

@@ -9,6 +9,13 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 - Nothing new yet!
 
+## [1.8.3] - 2020-09-05
+
+### Fixed
+
+- Fix issue where `font-variant-numeric` utilities would break in combination with most CSS minifier configurations ([f3660ce](https://github.com/tailwindlabs/tailwindcss/commit/f3660ceed391cfc9390ca4ea1a729a955e64b895))
+- Only warn about `conservative` purge mode being deprecated once per process ([58781b5](https://github.com/tailwindlabs/tailwindcss/commit/58781b517daffbaf80fc5c0791d311f53b2d67d8))
+
 ## [1.8.2] - 2020-09-04
 
 ### Fixed