fix(validation): updated upgradeDowngradeHistory Grades

[z3nful]

Changes

• Added missing possible entries
• in very rare cases, currentPrice is not returned in FinancialData, switched it to optional

Type

• New Module
• Other New Feature
• Validation Fix
• Other Bugfix
• Docs
• Chore/other

Comments/notes

[codecov]

Codecov Report

All modified lines are covered by tests ✅

Comparison is base (edaec4b) 93.05% compared to head (4a51889) 93.05%.
Report is 1 commits behind head on devel.

Additional details and impacted files

@@           Coverage Diff           @@
##            devel     #684   +/-   ##
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  Coverage   93.05%   93.05%           
=======================================
  Files          25       25           
  Lines         662      662           
  Branches      225      225           
=======================================
  Hits          616      616           
  Misses         46       46           

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[gadicc]

Awesome! Thanks, @z3nful, for another one of these 🙏

Noted the "Not a typo, how it was returned from API" 😂 Yahoo 🤷‍♂️

I'm assuming the BUy and HOld is the same story, I would just duplicate the same comment again to make this clear... and so that no one accidentally "fixes" this in the future on our side.

Otherwise looks great and thanks as usual!

[z3nful]

Np : )

I just added the note to the other 2 as well. It seems like 'SEll' could logically also be returned at some point, but I checked that module against 10k different stocks and its possible that these typos are just years old and have had some type of validation built in since then on Yahoos side.

[gadicc]

Awesome, thanks so much! 🙏

Yeah a big part of the validation is basically crowdsourcing community knowledge around weird API responses and this is certainly one of them! And the typescript integration makes this so great... the compiler will now warn people if they accidentally correctly spell these things and help them spell it in a way will keep their code working as expected!

[gadicc]

🎉 This PR is included in version 2.7.1 🎉

The release is available on:

• npm package (@latest dist-tag)
• GitHub release

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