Merge with test

Signed-off-by: Łukasz Gryglicki <lukaszgryglicki@o2.pl>

go.mod

@@ -23,6 +23,7 @@ require (
 	github.com/jessevdk/go-flags v1.5.0
 	github.com/jmoiron/sqlx v1.3.1
 	github.com/joho/godotenv v1.3.0
+	github.com/json-iterator/go v1.1.10
 	github.com/labstack/gommon v0.3.0
 	github.com/lib/pq v1.9.0
 	github.com/mailru/easyjson v0.7.7 // indirect