Update changelog + version numbers in readme and cmake file.

Author: m-dahl

README.md

@@ -14,7 +14,7 @@ These bindings are being written organically when things are needed by me and ot
 How to use
 --------------------
 1. Make sure you have libclang installed. (e.g. libclang-dev on ubuntu)
-2. Depend on this package in Cargo.toml: `r2r = "0.8.0"`
+2. Depend on this package in Cargo.toml: `r2r = "0.8.1"`
 3. You need to source your ROS2 installation before building/running.
 4. The bindings will rebuild automatically if/when you source your workspace(s).
 5. If you make changes to existing message types, run `cargo clean -p r2r_msg_gen` to force recompilation of the rust message types on the next build.
@@ -46,6 +46,9 @@ Changelog
 --------------------
 #### [Unreleased]
 
+#### [0.8.1] - 2023-11-30
+- Fix regression when building with colcon/cmake. <https://github.com/sequenceplanner/r2r/commit/7fc96e3eb2fd9f7f272258e07204041aeecfba76>
+
 #### [0.8.0] - 2023-10-05
 - Windows support! <https://github.com/sequenceplanner/r2r/pull/66>
 - Derive macro for ros parameters. <https://github.com/sequenceplanner/r2r/pull/65> and <https://github.com/sequenceplanner/r2r/pull/68>. NOTE: Breaks old parameters API, see commit message for details <https://github.com/sequenceplanner/r2r/commit/00d7a3db0b48c27a61ce153b084eadeef799765a>.

r2r_cargo.cmake

@@ -1,5 +1,5 @@
 #
-# For r2r 0.8.0.
+# For r2r 0.8.1.
 #
 # cmake code for simple colcon integration.
 # See https://github.com/m-dahl/r2r_minimal_node/