vendor: github.com/compose-spec/compose-go/v2 v2.1.2

Replaces uses of the github.com/mitchellh/mapstructure module, which
was deprecated by the owner and moved to new maintainership at
github.com/go-viper/mapstructure.

The old module is still referenced as indirect dependency (through
docker/cli and theupdateframework/notary), but not used in code, and
should eventually go away.

full diff: https://github.com/compose-spec/compose-go/compare/v2.1.1...v2.1.2

Signed-off-by: Sebastiaan van Stijn <github@gone.nl>

vendor/github.com/go-viper/mapstructure/v2/reflect_go1_20.go

@@ -0,0 +1,10 @@
+//go:build go1.20
+
+package mapstructure
+
+import "reflect"
+
+// TODO: remove once we drop support for Go <1.20
+func isComparable(v reflect.Value) bool {
+	return v.Comparable()
+}