v0.2.0

Changed
- Use crystal lang 1.3.2 (miry#31, @miry)

Added
- Export posts from a publication (miry#31, @miry)
- Allow to save images to assets folder with option `--assets-images` (miry#33, @miry)

Support crystal v1.0.0

Update the libraries and crystal version to 1.0.0
Switched to alpine version of crystal to build a static linking build in
Dockerfile.
It helps to decrease the size of docker image from 200MB to 20MB.
Reason to use Alpine: Static linking is not working properly with glibc.

Bump version to 0.1.9

Bump version to 0.1.8

Bump version to 0.1.7

Bump version to 0.1.6

Bump version to 0.1.5

Update image with new markdown feature

Bump version to 0.1.3

Docker: Update os version to ubuntu bionic