Update pip and pip-tools version to fix make upgrades

[edx-requirements-bot]

Additional information from script execution

Python code cleanup by the cleanup-python-code Jenkins job.

This pull request was generated by the cleanup-python-code Jenkins job, which ran

pip install --upgrade pip;pip install --upgrade pip-tools;pip-compile -v --allow-unsafe --rebuild -o requirements/pip.txt requirements/pip.in;pip-compile --upgrade -o requirements/pip-tools.txt requirements/pip-tools.in;make upgrade

The following packages were installed:
``

[codecov]

Codecov Report

Merging #198 (82a551e) into master (4550dd6) will not change coverage.
The diff coverage is n/a.

@@            Coverage Diff            @@
##            master      #198   +/-   ##
=========================================
  Coverage   100.00%   100.00%           
=========================================
  Files           12        12           
  Lines          412       412           
  Branches        64        64           
=========================================
  Hits           412       412           

Flag	Coverage Δ
unittests	100.00% <ø> (ø)

Flags with carried forward coverage won't be shown. Click here to find out more.

---

Continue to review full report at Codecov.

Legend - Click here to learn more
Δ = absolute <relative> (impact), ø = not affected, ? = missing data
Powered by Codecov. Last update 4550dd6...82a551e. Read the comment docs.