Updated Changelog

CHANGELOG.md

 # CHANGELOG
 
-## 2020 - 01 - 30
+## 2020 - 01 - 30 - Updated project to Unity 2019.3
-* Updated HD Render Pipeline / VFX Graph to package `7.1.8
+* Updated HD Render Pipeline / VFX Graph to package `7.1.8`
-* HDRP renders pitch-black on Linux Vulkan.
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+* HDRP renders pitch-black on Linux Vulkan
+* Post-Processing Issues on macOS metal
 
 ## 2019 - 08 - 07 - Initial Release