parsing option 'scalar': true|false|null will be scalar

[vanodevium]

#8

Just use like

convertToJson($jsonString, true);
convertToArray($jsonString, true);

[ovidyou]

Thanks @vanodevium for your contribution.

I acknowledge the issue described in #8 as a bug and that true, false and null should be transformed to JSON scalar values and not strings. In this regard, I don't see a reason why we should also keep the old behaviour through introducing the bool $scalar param to the convertToJson() and convertToArray() methods.

Could you remove the bool $scalar param? I will approve your contribution afterwards.

[vanodevium]

@ovidyou

done