devtool: add release command
devtool: add release command

* change version in swagger spec and Cargo.toml
* cargo update
* update credits
* update changelog

Fixes #821

Signed-off-by: Alexandra Iordache <750ec4522de000f31ad44d64614ad5747f238032@amazon.com>

firecracker-microvm/firecracker,firecracker-microvm/firecracker,firecracker-microvm/firecracker,firecracker-microvm/firecracker,firecracker-microvm/firecracker