Fix when no have params

lib/sqlite3.hpp

@@ -37,7 +37,7 @@ public:
      * Make a request to the database
      */
 
-    map<string, vector<string>> query(const string& sql_command, const vector<string>& values);
+    map<string, vector<string>> query(const string& sql_command, const vector<string>& values = {});
 
     /**
      * Close the database and destroy the object

test/test.cpp

@@ -9,7 +9,7 @@ int main() {
 
     SQLite3 mydb("../example/example.db", false);
 
-    auto res = mydb.query("Select * from Tab1 Where id > ?", {"3"});
+    auto res = mydb.query("Select * from Tab1");
     // cout << endl <<  res["NAME"][1];
 
     // cout << endl <<  res["MAIL"][1];