Dispose of WebSocket when done with it

[Shane32]

No description provided.

[STRATZ-Ken]

Can you push this to a preview build so I can test on production?

[Shane32]

@sungam3r Can you review this quickly?

[Shane32]

@sungam3r Merging now so @STRATZ-Ken can test it. Please comment when you get a chance. The API does change, but it's a non-breaking change.

[Shane32]

Published as nuget version 5.1.0-preview-127

[sungam3r]

Reviewed.

[codecov-commenter]

Codecov Report

Attention: Patch coverage is 0% with 11 lines in your changes missing coverage. Please review.

Project coverage is 54.77%. Comparing base (857a178) to head (bc0a3ea).
Report is 276 commits behind head on master.

Files with missing lines	Patch %	Lines
...ts.Subscriptions.WebSockets/WebSocketConnection.cs	0.00%	8 Missing ⚠️
...rts.Subscriptions.WebSockets/WebSocketTransport.cs	0.00%	3 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##           master     #671      +/-   ##
==========================================
- Coverage   54.79%   54.77%   -0.03%     
==========================================
  Files          64       64              
  Lines        1584     1592       +8     
  Branches      158      158              
==========================================
+ Hits          868      872       +4     
- Misses        662      666       +4     
  Partials       54       54              

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

🚀 New features to boost your workflow:

• ❄ Test Analytics: Detect flaky tests, report on failures, and find test suite problems.