Re: compilation of `ftinspect` fails

[Charlie Jiang]

[branch gsoc-2022-chariri-2, commit 8d73df1]

Hi Werner,

I've pushed a commit supporting older Qt versions (5.12). But I still 
recommend upgrading Qt since honestly, I don't know if I'll accidentally 
use more new features. On the other hand, Qt 5 has ceased to release new 
"minor" versions, so 5.15 would be the last, and I currently don't plan 
to go to Qt 6.

Cheers,
Charlie Jiang