Add CHANGELOG updates from v2.0.1

[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

• 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 PR #XYZ: [title]" (coding standards)

[codecov-io]

Codecov Report

Merging #137 into master will increase coverage by 0.4%.
The diff coverage is n/a.

@@            Coverage Diff            @@
##           master     #137     +/-   ##
=========================================
+ Coverage   65.65%   66.05%   +0.4%     
=========================================
  Files           5        5             
  Lines         492      492             
=========================================
+ Hits          323      325      +2     
+ Misses        138      136      -2     
  Partials       31       31