CHANGELOG.md in benchmark_driver-0.9.1 vs CHANGELOG.md in benchmark_driver-0.9.2

@@ -1,4 +1,10 @@
+# v0.9.2
+
+- Add `--verbose` option
+  - `--verbose 1` shows `ruby -v` for each executable
+  - `--verbose 2` shows executed scripts
+
 # v0.9.1
 
 - Fix memory runner bug that actually doesn't run the benchmarked script
 - Add once runner to test benchmark script in a short time