update to go 1.18

Signed-off-by: CrazyMax <crazy-max@users.noreply.github.com>

Author: crazy-max

Dockerfile

@@ -14,7 +14,7 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
-ARG GO_VERSION="1.16"
+ARG GO_VERSION="1.18"
 ARG GOLANGCI_LINT_VERSION="v1.37"
 ARG ADDLICENSE_VERSION="v1.0.0"
 

go.mod

@@ -1,10 +1,17 @@
 module github.com/docker/cli-docs-tool
 
-go 1.16
+go 1.18
 
 require (
 	github.com/spf13/cobra v1.2.1
 	github.com/spf13/pflag v1.0.5
 	github.com/stretchr/testify v1.7.0
 	gopkg.in/yaml.v2 v2.4.0
 )
+
+require (
+	github.com/davecgh/go-spew v1.1.1 // indirect
+	github.com/inconshreveable/mousetrap v1.0.0 // indirect
+	github.com/pmezard/go-difflib v1.0.0 // indirect
+	gopkg.in/yaml.v3 v3.0.0-20210107192922-496545a6307b // indirect
+)