0.21.0-alpine3.14

General improvements

• Upgraded Docker base image to alpine3.14

0.21.0-alpine3.12

General improvements

• upgraded OpenSC to v0.21.0
• upgraded libp11 to v0.4.11

0.20.0-alpine3.12

General improvements

• upgraded alpine base image to 3.12

0.20.0-alpine3.11

General improvements

• upgraded OpenSC to v0.20.0
• upgraded alpine base image to 3.11