Release 4.0.0

[mickmister]

Summary

• MM-51310 Implement OAuth2 Authentication (reopened) #949

• [MM-52755] Change user disconnect to HTTP POST #951

• [GH-954]:Fixed issue 'DM comment notifications not working' #961

• [GH-867]:Clicking the x next to an array element in the JIRA create issue modal causes a Javascript error #900

• [GH-819]:Create issue modal crashes when assignee is selected before switching projects #879

• Fixed plugin failure on Issue with no priority. #821

• MM-51188 Use mux.Router #923

• MM-50981 Remove usage of model.AppError  #921

• Allow the "@" character when parse jira usernames #925

• [MM-44185] Add conditions for subscription validation #858

• Upgrade lockfile and remove node-sass #931

• Add built info via /jira about #916

• Don't log unsupported webhook events as errors #964

• Adding /setup to autocomplete (GitHub issue mattermost#892) #898

Ticket Link

[codecov-commenter]

Codecov Report

Patch and project coverage have no change.

Comparison is base (97184a5) 29.65% compared to head (43552da) 29.65%.

Additional details and impacted files

@@           Coverage Diff           @@
##           master     #966   +/-   ##
=======================================
  Coverage   29.65%   29.65%           
=======================================
  Files          52       52           
  Lines        7792     7792           
=======================================
  Hits         2311     2311           
  Misses       5285     5285           
  Partials      196      196           

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[mickmister]

@hanzei I've updated the PR description with the changes for this release. It's been QA approved, and is now intended to be released.

[AayushChaudhary0001]

Tested and Passed
All the changes were seen working fine

Quick smoke tests:

• Instance install and uninstall
• User connect
• Issue view, assign, unassign
• Notifications for any activity on Jira
• OAuth setup for cloud

LGTM!