Move to Swift 4.0.2, Xcode 9.1, tagged version of CLibdill

Author: ratranqu

.swift-version

@@ -1 +1 @@
-4.0-DEVELOPMENT-SNAPSHOT-2017-06-11-a
+4.0.2

Package.swift

@@ -8,7 +8,7 @@ let package = Package(
         .library(name: "Venice", targets: ["Venice"])
     ],
     dependencies: [
-        .package(url: "https://github.com/Zewo/CLibdill.git", .branch("swift-4"))
+        .package(url: "https://github.com/Zewo/CLibdill.git", from: "2.0.0")
     ],
     targets: [
         .target(name: "Venice"),

circle.yml

@@ -1,6 +1,6 @@
 machine:
   xcode:
-    version: 9.0
+    version: 9.1
 dependencies:
   override:
     - eval "$(curl -sL http://sh.zewo.io/install-libdill.sh)"