(cargo-release) ece version 2.1.0

(cargo-release) ece version 2.0.0

(cargo-release) ece version 1.3.0

Prepare release v1.2.1

This includes a fix for padding in the legacy aesgcm mode,
and some opportunistic dependency updates.

Cut version 1.2.0

Bump version to 0.1.2

Bump version to 0.1.1

Prepare for publish