fix: send up to nanosecond precision

This commit was moved from ipfs/go-pinning-service-http-client@05198b4

pinning/remote/client/openapi/client.go

@@ -121,7 +121,7 @@ func parameterToString(obj interface{}, collectionFormat string) string {
 	if reflect.TypeOf(obj).Kind() == reflect.Slice {
 		return strings.Trim(strings.Replace(fmt.Sprint(obj), " ", delimiter, -1), "[]")
 	} else if t, ok := obj.(time.Time); ok {
-		return t.Format(time.RFC3339)
+		return t.Format(time.RFC3339Nano)
 	}
 
 	return fmt.Sprintf("%v", obj)