Prepare the 1.2.2 release (#169)

Author: erikcs

r-package/policytree/DESCRIPTION

@@ -1,6 +1,6 @@
 Package: policytree
 Title: Policy Learning via Doubly Robust Empirical Welfare Maximization over Trees
-Version: 1.2.1
+Version: 1.2.2
 Authors@R: c(
     person("Erik", "Sverdrup", role = c("aut", "cre"), email = "[email protected]"),
     person("Ayush", "Kanodia", role = "aut"),

releases/CHANGELOG.md

@@ -4,6 +4,11 @@ All notable changes to policytree will be documented in this file.
 The format is based on [Keep a Changelog](http://keepachangelog.com/en/1.0.0/)
 and this project adheres to [Semantic Versioning](http://semver.org/spec/v2.0.0.html).
 
+## [1.2.2] - 2023-06-23
+
+### Fixed
+- Drop C++11 compiler flag in src/Makevars per latest CRAN guidelines. [#168](https://github.com/grf-labs/policytree/pull/168)
+
 ## [1.2.1] - 2022-11-20
 
 ### Fixed