Use semver for releases

[josedonizetti]

I would prefer if trivy-operator used semver for releasing:

Given a version number MAJOR.MINOR.PATCH, increment the:

MAJOR version when you make incompatible API changes
MINOR version when you add functionality in a backwards compatible manner
PATCH version when you make backwards compatible bug fixes

Additional labels for pre-release and build metadata are available as extensions to the MAJOR.MINOR.PATCH format.

Currently we have been releasing features on the patch version.

wdyt?