Before this patch, if the go.mod did not contain a replace rule, jq would fail
(Cannot iterate over null), and Bash would produce an error when trying to add
an empty `$key` to `map_requires`:
    make verify-vendor
    + verify-vendor
      jq: error (at <stdin>:581): Cannot iterate over null (null)
      /go/src/github.com/containerd/containerd//script/verify-go-modules.sh: line 44: map_replaces_1[$key]: bad array subscript
      make: *** [Makefile:435: verify-vendor] Error 1
Signed-off-by: Sebastiaan van Stijn <github@gone.nl>

The regression in v1.22.2 has been resolved, so we can drop the
replace rule and use the latest v1.22.x version.
full diff: urfave/cli@v1.22.1...v1.22.9
Signed-off-by: Sebastiaan van Stijn <github@gone.nl>