4 - check image file limits set by set_file_limits()
6 - use TIFFReadDirectory() instead of TIFFSetDirectory() to step
7 through IFDs, since that handles IFD loops.
9 - update the bundled (and still modified) Devel::CheckLib
10 https://rt.cpan.org/Ticket/Display.html?id=69170
15 - the big types cleanup
20 - handle slightly different warning from libtiff 4.x
21 https://rt.cpan.org/Ticket/Display.html?id=65268
23 - replace (imager|tony)@imager.perl.org in the doc, since I don't
24 plan to continue receiving mail at that address.
25 https://rt.cpan.org/Ticket/Display.html?id=68591
30 Split out from Imager.