Implement Hashable hashString

[rugheid]

Checklist

• [x] New Extension
• [x] New Test
• [ ] Changed more than one extension, but all changes are related
• [x] Trivial change (doesn't require changelog)

[EZSwiftExtensionsBot]

	3 Messages
:book:	Executed 204 tests, with 0 failures (0 unexpected) in 4.813 (5.075) seconds
:book:	Executed 189 tests, with 0 failures (0 unexpected) in 4.364 (4.545) seconds
:book:	Executed 126 tests, with 0 failures (0 unexpected) in 3.865 (3.933) seconds

Generated by :no_entry_sign: Danger

[codecov-io]

Codecov Report

:exclamation: No coverage uploaded for pull request base (master@d132ea3). Click here to learn what that means. The diff coverage is 100%.

@@           Coverage Diff            @@
##             master    #485   +/-   ##
========================================
  Coverage          ?   43.6%           
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  Files             ?      52           
  Lines             ?    2314           
  Branches          ?       0           
========================================
  Hits              ?    1009           
  Misses            ?    1305           
  Partials          ?       0

Impacted Files	Coverage Δ
Sources/HashableExtensions.swift	100% <100%> (ø)

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[rugheid]

I think this PR is ready for merge now. 😀