Release v3.4.0

Bump version

Add 'test' command to run the tests for an exercise

Submit without specifying files

This release improves security and error handling. Releases are now g…

…enerated by GoReleaser

Bump version to v3.0.12

Bump version to 3.0.11

Bump version to v3.0.10

Bump version to v3.0.10-alpha.1

Bump version to v3.0.9