chore(release): 1.0.0-alpha.4 [skip ci]

# [1.0.0-alpha.4](https://code.podlibre.org/podlibre/castopod/compare/v1.0.0-alpha.3...v1.0.0-alpha.4) (2020-10-20)

### Features

* **analytics:** add charts and data export ([78625c47](https://code.podlibre.org/podlibre/castopod/commit/78625c471b4f03a09bd42f72b82217e1f2d01cef))