chore(release): 1.0.0-alpha.57 [skip ci]

# [1.0.0-alpha.57](https://code.podlibre.org/podlibre/castopod-host/compare/v1.0.0-alpha.56...v1.0.0-alpha.57) (2021-05-12)

### Bug Fixes

* **follow:** add missing helpers to Actor controller ([ee53a732](https://code.podlibre.org/podlibre/castopod-host/commit/ee53a732dc12ebbf5706e14969749a12cfd9d559))