Update changelog

Author: adamwathan

CHANGELOG.md

@@ -13,6 +13,12 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 - Add `col-span-full` and `row-span-full` ([#2471](https://github.com/tailwindlabs/tailwindcss/pull/2471))
 - Promote `defaultLineHeights` and `standardFontWeights` from experimental to future
 
+## [1.8.12] - 2020-10-07
+
+### Fixed
+
+- Reset color opacity variable in utilities generated using closure colors ([#2515](https://github.com/tailwindlabs/tailwindcss/pull/2515))
+
 ## [1.8.11] - 2020-10-06
 
 - Make `tailwindcss.plugin` work in ESM environments for reasons
@@ -934,7 +940,8 @@ No release notes
 
 - Everything!
 
-[unreleased]: https://github.com/tailwindlabs/tailwindcss/compare/v1.8.11...HEAD
+[unreleased]: https://github.com/tailwindlabs/tailwindcss/compare/v1.8.12...HEAD
+[1.8.12]: https://github.com/tailwindlabs/tailwindcss/compare/v1.8.10...v1.8.12
 [1.8.11]: https://github.com/tailwindlabs/tailwindcss/compare/v1.8.10...v1.8.11
 [1.8.10]: https://github.com/tailwindlabs/tailwindcss/compare/v1.8.9...v1.8.10
 [1.8.9]: https://github.com/tailwindlabs/tailwindcss/compare/v1.8.8...v1.8.9