Replace with jwt-go

[markphelps]

Fix https://ossindex.sonatype.org/vulnerability/c16fb56d-9de6-4065-9fca-d2b4cfb13020?component-type=golang&component-name=github.com%2Fdgrijalva%2Fjwt-go&utm_source=nancy-client&utm_medium=integration&utm_content=1.0.29

[codecov-commenter]

Codecov Report

Merging #621 (2fee0a9) into master (1b25676) will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##           master     #621   +/-   ##
=======================================
  Coverage   83.43%   83.43%           
=======================================
  Files          16       16           
  Lines        1443     1443           
=======================================
  Hits         1204     1204           
  Misses        207      207           
  Partials       32       32           

---

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 1b25676...2fee0a9. Read the comment docs.