MLIBZ-2677: Support for iOS 12 / Swift 4.2 / Xcode 10 (#321)

* MLIBZ-2677: Support for iOS 12 / Swift 4.2 / Xcode 10

* running unit tests in parallel

* upgrade to Swift 4.2

* removing warnings

.travis.yml

@@ -1,5 +1,5 @@
 language: objective-c
-osx_image: xcode9.4
+osx_image: xcode10
 cache:
   directories:
   - Carthage

Cartfile.private

@@ -1,4 +1,4 @@
 github "kif-framework/KIF" ~> 3.6
 github "Quick/Nimble" ~> 7.0
-github "glock45/swifter" ~> 1.0
+github "httpswift/swifter" "stable"
 github "weichsel/ZIPFoundation"

Cartfile.resolved

@@ -1,7 +1,7 @@
 github "DaveWoodCom/XCGLogger" "6.1.0"
 github "Hearst-DD/ObjectMapper" "3.3.0"
 github "Quick/Nimble" "v7.3.0"
-github "glock45/swifter" "1.4.2"
+github "httpswift/swifter" "b366f5ed088d9d0d216a9ce18ec726f7912c30f3"
 github "kif-framework/KIF" "v3.7.4"
 github "kishikawakatsumi/KeychainAccess" "v3.1.1"
 github "mxcl/PromiseKit" "6.4.0"