QML: Support int types from std library such as int8_t/int16_t/int32_t/...

I've got the following function:
Q_INVOKABLE void doSomething(uint16_t value);

When calling this function from QML I get:
example.qml:10: Error: Unknown method parameter type: uint16_t

Registering the type using qRegisterMetaType() had no effect.

I could of course just use `quint16`, but fixing this problem sounds like an easy task. Unfortunately I can't find where this can be done.