go.mod: increase minimum Go version to 1.18
Some of Go's tooling is unhappy that we're using generics when
advertising a minimum Go version of 1.17, so let's bump this to 1.18
which is what we're building with anyways.
Change-Id: I751d636a9cac82320268e8824965156646797378
Reviewed-on: https://review.monogon.dev/c/monogon/+/1406
Tested-by: Jenkins CI
Reviewed-by: Leopold Schabel <leo@monogon.tech>
diff --git a/go.mod b/go.mod
index 37b8525..458a91c 100644
--- a/go.mod
+++ b/go.mod
@@ -1,6 +1,6 @@
module source.monogon.dev
-go 1.17
+go 1.18
// Kubernetes is not fully consumable as a module, fix that
replace (