rc.2 updates

Author: tanner0101

Package.swift

@@ -8,7 +8,7 @@ let package = Package(
     ],
     dependencies: [
         // 🌎 Utility package containing tools for byte manipulation, Codable, OS APIs, and debugging.
-        .package(url: "https://github.com/vapor/core.git", .branch("master")),
+        .package(url: "https://github.com/vapor/core.git", from: "3.0.0-rc.2"),
     ],
     targets: [
         // Validation

circle.yml

@@ -31,7 +31,7 @@ jobs:
     steps:
       - run:
           name: Clone Vapor
-          command: git clone -b nio https://github.com/vapor/vapor.git
+          command: git clone -b master https://github.com/vapor/vapor.git
           working_directory: ~/
       - run:
           name: Switch Vapor to this Validation revision