CHANGELOG.md in benchmark_driver-0.4.5 vs CHANGELOG.md in benchmark_driver-0.5.0

@@ -1,4 +1,9 @@
+# v0.5.0
+
+- Automatic bundle install for each Ruby executable on `--bundler` or `--bundle`
+- CLI error handling is improved for empty/invalid arguments
+
 # v0.4.5
 
 - Allow specifying arguments for ruby executables
 
 # v0.4.4