Fixed the migration in an example

_examples/db/api_test.go

@@ -24,7 +24,7 @@ type apiFeature struct {
 	resp *httptest.ResponseRecorder
 }
 
-func (a *apiFeature) resetResponse(interface{}) {
+func (a *apiFeature) resetResponse(*messages.Pickle) {
 	a.resp = httptest.NewRecorder()
 	if a.db != nil {
 		a.db.Close()