Removing the "structcheck" and "varcheck" linters as they've been deprecated.
level=warning msg="[runner] The linter 'structcheck' is deprecated (since v1.49.0) due to: The owner seems to have abandoned the linter. Replaced by unused."
level=warning msg="[runner] The linter 'varcheck' is deprecated (since v1.49.0) due to: The owner seems to have abandoned the linter. Replaced by unused."
Signed-off-by: Sebastiaan van Stijn <github@gone.nl>
Go 1.16 reached end of life, so update to the current version of Go, but also
run CI on the previous version (which is still supported).
We should probably also decide wether or not we want the Dockerfiles to pin to
a specific minor version; this makes the releases more deterministic.
Signed-off-by: Sebastiaan van Stijn <github@gone.nl>
