v0.5.21

Spot instances (#23)

* Spot instances

* spot_price

* unused vars

* Restyle Spot instances (#24)

* Restyled by jq

* Restyled by prettier-json

* Restyled by whitespace

Co-authored-by: Restyled.io <commits@restyled.io>

* fix azure non spot

* no examples

* aws can not have negative price as azure

* docs

Co-authored-by: restyled-io[bot] <32688539+restyled-io[bot]@users.noreply.github.com>
Co-authored-by: Restyled.io <commits@restyled.io>