chore(release): 1.0.0-alpha.19 [skip ci]

# [1.0.0-alpha.19](https://code.podlibre.org/podlibre/castopod/compare/v1.0.0-alpha.18...v1.0.0-alpha.19) (2020-11-13)

### Bug Fixes

* handle HEAD requests on podcast_feed route ([74b2640f](https://code.podlibre.org/podlibre/castopod/commit/74b2640f2a25c4cd6fd8835fc492c2a6893d4950)), closes [#79](https://code.podlibre.org/podlibre/castopod/issues/79)