Go 1.13 Upgrade

[alexanderbez]

• Targeted PR against correct branch (see CONTRIBUTING.md)

• Linked to github-issue with discussion and accepted design OR link to spec that describes this work.

• Wrote tests

• Updated relevant documentation (docs/)

• Added a relevant changelog entry to the Unreleased section in CHANGELOG.md

• Re-reviewed Files changed in the github PR explorer

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For Admin Use:

• Added appropriate labels to PR (ex. wip, ready-for-review, docs)
• Reviewers Assigned
• Squashed all commits, uses message "Merge pull request #XYZ: [title]" (coding standards)

[codecov]

Codecov Report

Merging #4989 into master will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##           master    #4989   +/-   ##
=======================================
  Coverage   55.55%   55.55%           
=======================================
  Files         284      284           
  Lines       17460    17460           
=======================================
  Hits         9700     9700           
  Misses       7065     7065           
  Partials      695      695