Merge pull request #149 from vapor/cci2

Update CircleCI to 2.0

Author: vzsg

.circleci/config.yml

@@ -0,0 +1,37 @@
+version: 2
+
+jobs:
+  macos:
+    macos:
+      xcode: "9.0"
+    steps:
+      - run: brew install vapor/tap/vapor
+      - checkout
+      - run: swift build
+      - run: swift test
+
+  linux-3:
+    docker:
+      - image: swift:3.1.1
+    steps:
+      - run: apt-get install -yq libssl-dev
+      - checkout
+      - run: swift build
+      - run: swift test
+
+  linux:
+    docker:
+      - image: swift:4.0.3
+    steps:
+      - run: apt-get install -yq libssl-dev
+      - checkout
+      - run: swift build
+      - run: swift test
+
+workflows:
+  version: 2
+  tests:
+    jobs:
+      - macos
+      - linux-3
+      - linux