Bug/parsed return type

[pboling]

v2.0.10 had a regression where the return type of parsed changed to a vanilla Hash. It needs to be an instance of SnakyHash::StringKeyed in order to support the varied downstream use cases.

• New caboose workflow to run every version of Hashie on the oldest supported & runnable Ruby is an absolute wagon

Fixes #648
Fixes synth/omniauth-microsoft_graph#43

[coveralls]

Pull Request Test Coverage Report for Build 15177314078

Details

• 1 of 1 (100.0%) changed or added relevant line in 1 file are covered.
• No unchanged relevant lines lost coverage.
• Overall coverage remained the same at 100.0%

---

Totals
Change from base Build 15151844474:	0.0%
Covered Lines:	516
Relevant Lines:	516

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💛 - Coveralls

[github-actions]

Package	Line Rate	Branch Rate	Health
oauth2	100%	100%	✔
Summary	100% (516 / 516)	100% (170 / 170)	✔

Minimum allowed line rate is 100%

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 0.00%. Comparing base (2e3da41) to head (bfcdd89).
Report is 12 commits behind head on main.

Additional details and impacted files

@@     Coverage Diff     @@
##   main   #650   +/-   ##
===========================
===========================

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