Add #1416 Add expand property to SectionBlock class

[seratch]

This pull request resolves #1416

Category (place an x in each of the [ ])

• bolt (Bolt for Java)
• bolt-{sub modules} (Bolt for Java - optional modules)
• slack-api-client (Slack API Clients)
• slack-api-model (Slack API Data Models)
• slack-api-*-kotlin-extension (Kotlin Extensions for Slack API Clients)
• slack-app-backend (The primitive layer of Bolt for Java)

Requirements

Please read the Contributing guidelines and Code of Conduct before creating this issue or pull request. By submitting, you agree to those rules.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 73.26%. Comparing base (441b008) to head (66d594f).
Report is 1 commits behind head on main.

Additional details and impacted files

@@             Coverage Diff              @@
##               main    #1420      +/-   ##
============================================
+ Coverage     73.23%   73.26%   +0.03%     
- Complexity     4369     4370       +1     
============================================
  Files           474      474              
  Lines         14182    14185       +3     
  Branches       1433     1433              
============================================
+ Hits          10386    10393       +7     
+ Misses         2952     2947       -5     
- Partials        844      845       +1     

☔ View full report in Codecov by Sentry.
📢 Have feedback on the report? Share it here.