Update httpclient to 4.5.6

[scala-steward]

Updates org.apache.httpcomponents:httpclient from 4.5.4 to 4.5.6.

I'll automatically update this PR to resolve conflicts as long as you don't change it yourself.

If you'd like to skip this version, you can just close this PR. If you have any feedback, just mention @scala-steward in the comments below.

Have a nice day!

[codecov]

Codecov Report

Merging #139 into master will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##           master     #139   +/-   ##
=======================================
  Coverage   69.76%   69.76%           
=======================================
  Files          22       22           
  Lines         635      635           
  Branches        9        9           
=======================================
  Hits          443      443           
  Misses        192      192

---

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 8d7ca5d...2c26f51. Read the comment docs.