Adding swift 4 tag post release.

[Khalian]

Checklist

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

[EZSwiftExtensionsBot]

	3 Messages
:book:	Executed 202 tests, with 0 failures (0 unexpected) in 5.008 (5.248) seconds
:book:	Executed 187 tests, with 0 failures (0 unexpected) in 4.412 (4.645) seconds
:book:	Executed 124 tests, with 0 failures (0 unexpected) in 4.032 (4.165) seconds

Generated by :no_entry_sign: Danger

[codecov-io]

Codecov Report

Merging #480 into master will not change coverage. The diff coverage is n/a.

@@           Coverage Diff           @@
##           master     #480   +/-   ##
=======================================
  Coverage   43.09%   43.09%           
=======================================
  Files          50       50           
  Lines        2265     2265           
=======================================
  Hits          976      976           
  Misses       1289     1289

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