Properly support CONCAT in Postgres and SQLite

pkg/cast2/slice.go

@@ -0,0 +1,12 @@
+package cast2
+
+// Anys converts any kinds of values to a []any slice
+func Anys[C any](in ...C) (out []any) {
+	out = make([]any, len(in))
+
+	for i := range in {
+		out[i] = in[i]
+	}
+
+	return
+}