`coverage: 0.0% of statements` lines are not hidden

[adombeck]

When I run go tests with coverage:

go test -json -cover ./... 2>&1 | tee /tmp/gotestfmt.log | gotestfmt --hide=all

Then packages which have 0% coverage are printed like this:

Packages which have >0% coverage are not printed (as expected).

Here is the gotestfmt.log.