Update imagemagick to version 7.0.7.31

I was checking if it might fix the segfault problems, as the changelog
indicated that several memory overflows have been fixed, but they still
happen for me.

packages/imagemagick/build.sh

@@ -1,7 +1,7 @@
 TERMUX_PKG_HOMEPAGE=https://www.imagemagick.org/
 TERMUX_PKG_DESCRIPTION="Suite to create, edit, compose, or convert images in a variety of formats"
-TERMUX_PKG_VERSION=7.0.7.29
-TERMUX_PKG_SHA256=be171d13e58bb19685b36080edf9d36b9b95633b0331fbf7e70b5997a3501d65
+TERMUX_PKG_VERSION=7.0.7.31
+TERMUX_PKG_SHA256=2208eb6b9355fda4279ed1861523830aec1f9b0a39bf8c20718d1c8f5ad42710
 local _download_version=`echo $TERMUX_PKG_VERSION | sed 's/\(.*\)\./\1-/'`
 TERMUX_PKG_SRCURL=https://github.com/ImageMagick/ImageMagick/archive/${_download_version}.tar.gz
 TERMUX_PKG_EXTRA_CONFIGURE_ARGS="