Fix visitExpression for multilevel property access

[IanusInferus]

I have found a bug in reordering files.
When doing multi-level property access, upper levels of the access is not visited for file dependency.
Example:
P.ts

class P
{
    public func() {
    }
}

Program.ts

class Program
{
    static main(): void
    {
        Q.p.func();
    }
}

Program.main();

Q.ts

class Q
{
    static get p(): P
    {
        return new P();
    }
}

In Q.p.func, "func" to file "P.ts" is visited, but "p" to "Q.ts" is not visited.

tscplus-test.zip

[domchen]

Thanks for your PR. Good job!