Merge branch-0.18 into branch-0.19

Author: ajschmidt8

CHANGELOG.md

@@ -6,18 +6,9 @@
 
 ## Bug Fixes
 
-# RMM 0.18.0 (Date TBD)
-
-## New Features
-
-- PR #636 Add a `Stream` class to manage CUDA streams in Python
-
-## Improvements
-
-- PR #647 Simplify `rmm::exec_policy` and refactor Thrust support
-
-## Bug Fixes
+# 0.18.0
 
+Please see https://github.com/rapidsai/rmm/releases/tag/branch-0.18-latest for the latest changes to this development branch.
 
 # RMM 0.17.0 (10 Dec 2020)