feat(array): support Vec<(K,V)> for hashtables

[Xenira]

Refs: #425

Description

HashMap<K,V> looses ordering information.
This will add support for Vec<(K,V)>. Index map will be added in separate pr.

Checklist

Check the boxes that apply (put an x in the brackets, like [x]). You can also check boxes after the PR is created.

• I have read the contribution guidelines.
• I have added tests that prove my code works as expected.
• I have added documentation if applicable.
• I have added a migration guide if applicable.

❤️ Thank you for your contribution!

[coveralls]

Pull Request Test Coverage Report for Build 16350571405

Details

• 35 of 37 (94.59%) changed or added relevant lines in 1 file are covered.
• No unchanged relevant lines lost coverage.
• Overall coverage increased (+2.3%) to 24.606%

---

Changes Missing Coverage	Covered Lines	Changed/Added Lines	%
src/types/array.rs	35	37	94.59%

Totals
Change from base Build 16276541582:	2.3%
Covered Lines:	968
Relevant Lines:	3934

---

💛 - Coveralls