Qrm refactor

- Allow custom types Scan method to read values returned by the driver rather then the value from intermediate Null types. Scan to intermidiate Null types removed.
- Better error handling

internal/utils/min/min.go

@@ -0,0 +1,9 @@
+package min
+
+// Int returns minimum of two int values
+func Int(a, b int) int {
+	if a < b {
+		return a
+	}
+	return b
+}