add command line tests

Add the second publication

remove prerequisites and build the project in Xcode

remove variables for swift-4.0-RELEASE in Makefile

update xcode version for travis

add .swift-version (for the travis)

update travis yaml to xcode 10

update the simulator and deployment SDKs, and the device

increment deployment target and iOS simulator to 11.2

move updating SharedServerClient deployment target into a separate Makefile target

removed setting deployment version during test

updated deployment and simulator versions

added a comment about initial - in Makefile

updated deployment target and swift version

updated iOS deployment target to 11.0