Make Get return nil instead of []byte{}

sqlite3/sqlite3.go

@@ -85,7 +85,7 @@ func (s *Storage) Get(key string) ([]byte, error) {
 
 	// If the expiration time has already passed, then return nil
 	if time.Now().After(time.Unix(exp, 0)) {
-		return []byte{}, nil
+		return nil, nil
 	}
 
 	return data, nil

sqlite3/sqlite3_test.go

@@ -37,5 +37,5 @@ func Test_Expiration(t *testing.T) {
 
 	b, err := s.Get("fiber-20k-stars?")
 	utils.AssertEqual(t, nil, err)
-	utils.AssertEqual(t, []byte{}, b)
+	utils.AssertEqual(t, true, b == nil)
 }