Add CorrectUmis to dagr tasks

[gpratt]

CorrectUmis from fgbio doesn't have a corresponding dagr task. This PR adds that task.

Preliminary tests indicate this task works for my purposes, so I'm happy.

Two open questions for this PR:

1. The style of the tasks in dagr is a bit inconsistent, I used the FilterConsensusReads style just because it was a nice guide for all the features I wanted to use. Let me know if you want to use a different style here.
2. There is currently no scaladoc in dagr tasks. Let me know if you want to start adding scaladoc.

[codecov-io]

Codecov Report

Merging #366 into master will not change coverage. The diff coverage is n/a.

@@           Coverage Diff           @@
##           master     #366   +/-   ##
=======================================
  Coverage   91.95%   91.95%           
=======================================
  Files          31       31           
  Lines        1156     1156           
  Branches       65       65           
=======================================
  Hits         1063     1063           
  Misses         93       93

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[gpratt]

Done!