Update libvips and pyproj versions.

Also, make more reproducible builds.  By default, pip injects a symbol
with its build directory into compiled files.  See
pypa/pip#6505.  This can be avoided by
preventing debug symbols by adding `CFLAGS=-g0`.  Additionally, the
wheels contain a few files with the current time stamp rather than the
time given by `SOURCE_DATE_EPOCH`, so the perl tool
`strip-nodeterminism` is used to redate the files within the wheels to
the `SOURCE_DATE_EPOCH`.

build.sh

@@ -3,13 +3,16 @@
 set -e
 
 docker pull quay.io/pypa/manylinux2010_x86_64:latest
-docker build --force-rm -t manthey/large_image_wheels .
+# Use the author date (not the commit date) for SOURCE_DATE_EPOCH.  This 
+# allows adding the generated wheels to an existing commit without changing the
+# epoch used in the build.
+docker build --force-rm -t manthey/large_image_wheels --build-arg SOURCE_DATE_EPOCH=$(git log -1 --pretty="format:%at" Dockerfile) .
 mkdir -p docs
 ls -al docs
 # echo run -v `pwd`/docs:/opt/mount --rm --entrypoint bash manthey/large_image_wheels -c 'cp /io/wheelhouse/{GDAL,libtiff,mapnik,openslide_python,pyvips,psutil,ujson,pyproj}*many* /opt/mount/. && chown '`id -u`':'`id -g`' /opt/mount/*.whl'
 docker run -v `pwd`/docs:/opt/mount --rm --entrypoint bash manthey/large_image_wheels -c 'cp /io/wheelhouse/{GDAL,libtiff,mapnik,openslide_python,pyvips,psutil,ujson,pyproj}*many* /opt/mount/. && chown '`id -u`':'`id -g`' /opt/mount/*.whl'
 python make_index.py
 ls -al docs
-python check_versions.py > docs/versions.txt 
+python check_versions.py > docs/versions.txt
 git diff docs/versions.txt | cat