Updating BFKit-Swift to 2.1.x

Author: FabrizioBrancati

Package.swift

@@ -4,7 +4,7 @@ let package = Package(
     name: "SwiftyBot",
     dependencies: [
         .Package(url: "https://github.com/vapor/vapor.git", majorVersion: 1, minor: 3),
-        .Package(url: "https://github.com/FabrizioBrancati/BFKit-Swift.git", majorVersion: 2, minor: 0)
+        .Package(url: "https://github.com/FabrizioBrancati/BFKit-Swift.git", majorVersion: 2, minor: 1)
     ],
     exclude: [
         "Config",