On a Delete event, the ResourceVersion for the Secret is not the
same as previously stored when added or updated. pem.Have()
may have incorrectly concluded that the PEM file was not stored,
this fixes that error.

Trying to make go get for this repo work has been a dependency
nightmare; if there's a way for it to work at all (and I haven't had
proof that there is), it's far more effort and pain than it's worth.

Newer versions of the k8s libs have dependencies that evidently
require Go 1.16. Apart from the complications that may arise from
migrating the language version:

- Go 1.16 is currently not provided in the package repos for distros
such as Debian.

- go get -d under Go 1.16 downloads the source to directories under
$GOPATH/pkg/mod/ with the version in the directory name. This can cause
scripts running go get to break, since they have to get the version
name exactly right. Source code download is necessary for packages
that cannot be built with go build alone (for example if they require
a make command).

- go get -d under Go 1.16 appparently doesn't download go.mod for
some reason, which may make a build impossible.

On the other hand, git clone && make install for this repo just
works.

At least we're upgrading to a newer 0.16.x micro version than was
previously supported.