package/python-pymupdf: bump to version 1.18.14

package/python-pymupdf: bump to version 1.18.14

Recent tarballs from PyPI use setuptools instead of distutils, so
change `PYTHON_PYMUPDF_SETUP_TYPE`.

They also include a license file, so include it and a hash for it.

This version also has a new dependency: freetype2.

PYTHON_PYMUPDF_REMOVE_PATHS is updated to take the new dependency into
account, but also the sed command are changed to delete include lines
instead of turning them into empty strings. Indeed, empty include
strings lead to using multiple `-I` flags which were not followed by
anything. Depending on the number of empty include strings (because
two successive `-I` "cancel" each other out), it would have failed to
compile.

Also, it turns out the patch version of python-pymupdf doesn't have to
match mupdf's version (e.g. python-pymupdf 1.18.14 is compatible with
mupdf 1.18.*) so while at it, remove the word "exactly" from the
comment.

Signed-off-by: Raphaël Mélotte <raphael.melotte@mind.be>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>