make test is now working for 3.8

[ip4368]

Description

Coverage fixed the issue with multiprocessing on 4.5.4: nedbat/coveragepy#828
The other issue on PyLint/astroid is also fixed, but version bump is not needed as it is not a direct dependency: pylint-dev/astroid#675

test plan:
make lint test runs fine on 3.8rc
wait for Travis CI

Fixes: #26

[codecov]

Codecov Report

Merging #34 into master will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##           master      #34   +/-   ##
=======================================
  Coverage   86.93%   86.93%           
=======================================
  Files           2        2           
  Lines         245      245           
  Branches       34       34           
=======================================
  Hits          213      213           
  Misses         22       22           
  Partials       10       10

---

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 d3e4080...2804a04. Read the comment docs.