Hid DefaultVersion definition.

Also updated to default version to go 1.18.

Signed-off-by: Kelton Bassingthwaite <KeltonBassingthwaite@gmail.com>

pkg/universe.dagger.io/go/image.cue

@@ -5,11 +5,11 @@ import (
 )
 
 // Go image default version
-#DefaultVersion: "1.16"
+#_DefaultVersion: "1.18"
 
 // Build a go base image
 #Image: {
-	version: *#DefaultVersion | string
+	version: *#_DefaultVersion | string
 
 	packages: [pkgName=string]: version: string | *""
 

pkg/universe.dagger.io/go/test/image.cue

@@ -18,7 +18,7 @@ dagger.#Plan & {
 				command: {
 					name: "/bin/sh"
 					args: ["-c", """
-							go version | grep "1.16"
+							go version | grep "1.18"
 						"""]
 				}
 			}