Update image go version to 1.18

Paulo Gomes · Paulo Gomes · commit 24975ff4c0f7 · 2022-05-03T14:23:19.000+01:00
Signed-off-by: Paulo Gomes &lt;paulo.gomes@weave.works&gt;
diff --git a/Dockerfile b/Dockerfile
@@ -1,6 +1,6 @@
 # This Dockerfile tests the hack/Makefile output against git2go.
 ARG BASE_VARIANT=alpine
-ARG GO_VERSION=1.17
+ARG GO_VERSION=1.18
 ARG XX_VERSION=1.1.0
 
 FROM --platform=$BUILDPLATFORM tonistiigi/xx:${XX_VERSION} AS xx
diff --git a/Dockerfile.test b/Dockerfile.test
@@ -1,6 +1,6 @@
 # This Dockerfile tests the hack/Makefile output against git2go.
 ARG BASE_VARIANT=alpine
-ARG GO_VERSION=1.17
+ARG GO_VERSION=1.18
 ARG XX_VERSION=1.1.0
 
 FROM --platform=$BUILDPLATFORM tonistiigi/xx:${XX_VERSION} AS xx
