Update Go to 1.18

This should let us use generics.

Signed-off-by: Philipp Schrader <philipp.schrader@gmail.com>
Change-Id: Iea3d616c21a739ba899c435b599a7a44bf1bf23a
diff --git a/WORKSPACE b/WORKSPACE
index d980dab..4a00be7 100644
--- a/WORKSPACE
+++ b/WORKSPACE
@@ -1081,7 +1081,7 @@
 
 go_rules_dependencies()
 
-go_register_toolchains(version = "1.17.1")
+go_register_toolchains(version = "1.18")
 
 load("@bazel_gazelle//:deps.bzl", "gazelle_dependencies")
 load("//:go_deps.bzl", "go_dependencies")