Update fs2 and http4s

[fthomas]

No description provided.

[codecov]

Codecov Report

Merging #2078 (d150e66) into master (dee5588) will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##           master    #2078   +/-   ##
=======================================
  Coverage   78.38%   78.38%           
=======================================
  Files         132      132           
  Lines        2272     2272           
  Branches       50       50           
=======================================
  Hits         1781     1781           
  Misses        491      491           

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