Need to update requests version for security reasons

[SrNetoChan]

Description

Message from @rduivenvoorde on the commnunity mailinglist:

On the QGIS-Documentation repository I got a message from github,
telling us we use a component with a security issue ("moderate
severity")in it, pointing to:

https://github.com/qgis/QGIS-Documentation/network/alert/REQUIREMENTS.txt/requests/open
Pointing to
https://nvd.nist.gov/vuln/detail/CVE-2018-18074

It's about the used python requests-module, and tells us:
Upgrade requests to version 2.20.0 or later.
Apparently, we use an older version-nr in our REQUIREMENTS.txt.

Please remind me to do this, or can somebody else try/test.

Checklist

• I'm aware this repository is about QGIS Documentation and the issue I'm reporting is related to its usage.
  If it's related to QGIS application or website, please refer to http://qgis.org/en/site/getinvolved/development/bugreporting.html
  for the right issue tracker or to the support channels
• I have added a link to the page concerned by the issue

[SrNetoChan]

@rduivenvoorde ,

I changed the requests version to 2.20 in the requirements.txt file and updated my virtualenv to reflect that.

I was able to build html (english only).

I also tried the docker image and everything built without issues, but I am not sure if the requirements are taken in consideration in the docker build (probably not)

I was not able to build any PDF, not sure If I am missing some piece, but I always get the following:

(---)
copying TeX support files...
done
build succeeded, 1 warning.
# Compile the pdf docs for that locale
# we use texi2pdf since latexpdf target is not available via
# sphinx-build which we need to use since we need to pass language flag
mkdir -p output/pdf/en
# need to build 3x to have proper toc and index
# currently texi2pdf has bad exit status. Please ignore errors!!
# prepending the texi2pdf command with - keeps make going instead of quitting
# japanese pdf has problems, when build with texi2pdf
# as alternative we can use platex
# for russian pdf you need package 'texlive-lang-cyrillic' installed
# for japanese pdf you need: 'cmap-adobe-japan1 cmap-adobe-japan2 latex-cjk-all nkf okumura-clsfiles ptex-base ptex-bin texlive-fonts-extra'
/usr/bin/texi2dvi: pdflatex exited with bad status, quitting.
/usr/bin/texi2dvi: pdflatex exited with bad status, quitting.
/usr/bin/texi2dvi: pdflatex exited with bad status, quitting.
make: [pdf] Error 1 (ignored)
Makefile:83: recipe for target 'pdf' failed
mv output/latex/en/QGISUserGuide.pdf output/pdf/en/QGIS-testing-UserGuide.pdf
# pyqgis developer cookbook
/usr/bin/texi2dvi: pdflatex exited with bad status, quitting.
/usr/bin/texi2dvi: pdflatex exited with bad status, quitting.
/usr/bin/texi2dvi: pdflatex exited with bad status, quitting.
make: [pdf] Error 1 (ignored)
Makefile:83: recipe for target 'pdf' failed
mv output/latex/en/PyQGISDeveloperCookbook.pdf output/pdf/en/QGIS-testing-PyQGISDeveloperCookbook.pdf
# training manual
mv output/latex/en/QGISTrainingManual.pdf output/pdf/en/QGIS-testing-QGISTrainingManual.pdf
# developer guidelines
mv output/latex/en/QGISDevelopersGuide.pdf output/pdf/en/QGIS-testing-QGISDevelopersGuide.pdf

[SrNetoChan]

The issue was fixed here:
9dc6e09