Swift SWIFT_VERSION in xcodeproj to 4.0

[jpsim]

to silence a warning in Xcode 9+ that "Conversion to Swift 4 is available"

[codecov-io]

Codecov Report

Merging #191 into master will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##           master     #191   +/-   ##
=======================================
  Coverage   26.64%   26.64%           
=======================================
  Files          15       15           
  Lines        2229     2229           
=======================================
  Hits          594      594           
  Misses       1635     1635

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[drmohundro]

Thanks @jpsim! I just released 4.7.1 with this change.

[jpsim]

Thanks!

…

On Sat, Aug 4, 2018 at 12:53 David Mohundro ***@***.***> wrote: Thanks @jpsim <https://github.com/jpsim>! I just released 4.7.1 with this change. — You are receiving this because you were mentioned. Reply to this email directly, view it on GitHub <#191 (comment)>, or mute the thread <https://github.com/notifications/unsubscribe-auth/AAc-qqLzMtD7_rNjEQVsBPPvvH2zAJk2ks5uNfuvgaJpZM4VvFUy> .