- version update to 7.0.11.11
* FL32 no longer returns scambled results (reference
https://github.com/ImageMagick/ImageMagick/issues/3614).
* Ashlar pseudo-image format no longer crops labels in last row of tiles by
default (reference https://github.com/ImageMagick/ImageMagick/issues/3618).
* Optimize CompareImageBounds().
* Check image is not NULL before dereferencing.
* eliminate uninitialized value
* Differences in computing linear gray (reference
https://github.com/ImageMagick/ImageMagick/issues/3571).
* added support for pdf:author, pdf:producer and pdf:title when writing a
PDF file.

- force --with-fftw delegate support. FFTW3 is a BuildRequirement
but not detected automatically.