* update versions of dependencies on swift4 and swift3

* change syntax for swift4

* run petstore script

* change enum case from UpperCamel to lowerCamel

* remove unneeded break statements

* avoid wrapping conditionals in parentheses

* avoid force casting

* run pod update on petstore/swift4/rxswift

* update project for swift 4

* run swift4-petstore-all.sh

* fix compile error

* avoid use iso8601 date strategy for encoder / decoder

* resolve file references