Prepare v0.8.2 releases

[daohoangson]

No description provided.

[github-actions]

Demo app

Deployed 6216031 to https://example-e9ohzmm25-flutter-widget-from-html.vercel.app.

Quick links:

• supported/tags.html
• Hello World
• Hello World (core)
• Wordpress
• --web-renderer canvaskit
• --web-renderer html

[codecov]

Codecov Report

Merging #626 (d8a01bb) into master (296aad2) will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##           master     #626   +/-   ##
=======================================
  Coverage   98.47%   98.47%           
=======================================
  Files          62       62           
  Lines        3673     3673           
=======================================
  Hits         3617     3617           
  Misses         56       56           

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