Update to version v8.0.0 and add Upgrading notes

[rogebrd]

Checklist

General Contributing

• Have you read the Code of Conduct and signed the CLA?

Is This a Code Change?

• Non-code related change (markdown/git settings etc)
• SDK Code Change
• Example/Test Code Change

Validation

• Does npm test pass?
• Does npm run build pass?
• Does npm run lint pass?

[codecov]

Codecov Report

Merging #425 (2d2eca1) into main (0bdf781) will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##             main     #425   +/-   ##
=======================================
  Coverage   52.19%   52.19%           
=======================================
  Files           7        7           
  Lines         730      730           
=======================================
  Hits          381      381           
  Misses        349      349           

Flag	Coverage Δ
integration	46.71% <ø> (ø)
unit	47.26% <ø> (ø)

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