Local variables of type `id<SomeProtocol>` are incorrectly declared as `weak`

[amorde]

Similar to #202

Input:

- (void)someFunction;
{
    id<SomeProtocol> value = [self makeSomeValue];
}

Result:

func someFunction() {
     weak var value = makeSomeValue()
}

[alex-swiftify]

@amorde Fixed (the changes will be available since the next converter update).

Converter output:

func someFunction() {
    let value = makeSomeValue()
}