release: v0.0.66 (#6020)

#### Bug Fixes

*   remove slog Context log calls (#6018) ([2589380b](https://github.com/kythe/kythe/commit/2589380b2cdf95da00d8030dd9605c3c15d500aa))

#### Features

* **java_indexer:**  support more metadata types (#6017) ([28cf6700](https://github.com/kythe/kythe/commit/28cf6700649bf4f98aa6b96a672e18b0192e8388))