port 1.2.2 changelog to master

[reaperhulk]

No description provided.

[mention-bot]

By analyzing the blame information on this pull request, we identified @alex, @Ivoz and @sigmavirus24 to be potential reviewers

[codecov-io]

Current coverage is 100.00%

Merging #2698 into master will not affect coverage as of 2635517

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  Files          128     128       
  Stmts        13853   13853       
  Branches      1475    1475       
  Methods          0       0       
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  Hit          13853   13853       
  Partial          0       0       
  Missed           0       0       

Review entire Coverage Diff as of 2635517

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[sigmavirus24]

Because I was pinged, 👍

[coveralls]

Changes Unknown when pulling 2c6b8d0 on reaperhulk:port-1.2.2-changelog into ** on pyca:master**.