Draft: Add `call` and `is_callable` to QJSValue#225

Draft

gikari wants to merge 3 commits intowoboq:masterfrom gikari:gikari/qjsvalue-call

+236-5

Commits on Jan 8, 2022

feat(qmetaobject): add "is" wrappers for special QJSValues
Mikhail Zolotukhin
committed

Commits on Jan 10, 2022

feat(qmetaobject): add null and undefined functions to QJSValue
Mikhail Zolotukhin
committed

Commits on Jan 11, 2022

feat(qmetaobject): add call & is_callable to QJSValue
Mikhail Zolotukhin
committed