[MacPorts] #56833: py-Pillow: Update to 5.2.0, add Python 3.7

[MacPorts]

#56833: py-Pillow: Update to 5.2.0, add Python 3.7
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  Reporter:  radarhere    |      Owner:  stromnov
      Type:  enhancement  |     Status:  reopened
  Priority:  Normal       |  Milestone:
 Component:  ports        |    Version:
Resolution:               |   Keywords:
      Port:  py-Pillow    |
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Comment (by reneeotten):

 missing dependency added by mamoll in https://github.com/macports
 /macports-ports/commit/c0673ea525534a0fa0ce52aa6f129d29c2e90b40. Update to
 latest version in PR https://github.com/macports/macports-ports/pull/2256

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Ticket URL: <https://trac.macports.org/ticket/56833#comment:3>
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