CHANGELOG.md in benchmark_driver-0.15.0 vs CHANGELOG.md in benchmark_driver-0.15.1

@@ -1,4 +1,8 @@
+# v0.15.1
+
+- `BenchmarkDriver::BulkOutput#initialize` takes `options` option for `super`
+
 # v0.15.0
 
 - Introduce output plugin interface to accept arbitrary `--output-xxx` option
 - Hide `--rbenv` option when `rbenv` command is not available