CHANGELOG.md: add important addition to v0.9.0 that was missed
- New flags `--csv-channel` and `--default-channel` for subcommand [`gen-csv`](https://github.com/operator-framework/operator-sdk/blob/master/doc/sdk-cli-reference.md#gen-csv) that add channels to and update the [package manifest](https://github.com/operator-framework/operator-registry/#manifest-format) in `deploy/olm-catalog/<operator-name>` when generating a new CSV or updating an existing one. ([#1364](https://github.com/operator-framework/operator-sdk/pull/1364))
- Adds `go.mod` and `go.sum` to switch from `dep` to [Go modules](https://github.com/golang/go/wiki/Modules) to manage dependencies for the SDK project itself. ([#1566](https://github.com/operator-framework/operator-sdk/pull/1566))
- New flag `--operator-name` for [`operator-sdk olm-catalog gen-csv`](https://github.com/operator-framework/operator-sdk/blob/master/doc/sdk-cli-reference.md#gen-csv) to specify the operator name, ex. `memcached-operator`, to use in CSV generation. The project's name is used (old behavior) if `--operator-name` is not set. ([#1571](https://github.com/operator-framework/operator-sdk/pull/1571))
+- New flag `--local-operator-flags` for `operator-sdk test local --up-local` to specify flags to run a local operator with during a test. ([#1509](https://github.com/operator-framework/operator-sdk/pull/1509))
### Changed
