Update CI versions (#718)

.travis.yml

@@ -25,14 +25,14 @@ jobs:
       os: linux
       dist: bionic
       script: ./.travis-script.sh
-      env: RUN_INTEROP_TESTS=false SWIFT_VERSION=5.1.3
+      env: RUN_INTEROP_TESTS=false SWIFT_VERSION=5.1.4
     - &development
       <<: *tests
-      name: "Unit Tests: Ubuntu 18.04 (Swift 5.2 Development Snapshot 2020-01-22)"
+      name: "Unit Tests: Ubuntu 18.04 (Swift 5.2 Development Snapshot 2020-02-06)"
       env: >-
         RUN_INTEROP_TESTS=false
         SWIFT_VERSION=5.2
-        SWIFT_URL=https://swift.org/builds/swift-5.2-branch/ubuntu1804/swift-5.2-DEVELOPMENT-SNAPSHOT-2020-01-22-a/swift-5.2-DEVELOPMENT-SNAPSHOT-2020-01-22-a-ubuntu18.04.tar.gz
+        SWIFT_URL=https://swift.org/builds/swift-5.2-branch/ubuntu1804/swift-5.2-DEVELOPMENT-SNAPSHOT-2020-02-06-a/swift-5.2-DEVELOPMENT-SNAPSHOT-2020-02-06-a-ubuntu18.04.tar.gz
     - <<: *tests
       name: "Unit Tests: Ubuntu 18.04 (Swift 5.0)"
       env: RUN_INTEROP_TESTS=false SWIFT_VERSION=5.0.3
@@ -52,7 +52,7 @@ jobs:
       os: linux
       dist: bionic
       script: ./.travis-script.sh
-      env: RUN_INTEROP_TESTS=true SWIFT_VERSION=5.1.3
+      env: RUN_INTEROP_TESTS=true SWIFT_VERSION=5.1.4
     - <<: *interop_tests
       name: "Interoperability Tests: Ubuntu 18.04 (Swift 5.0)"
       env: RUN_INTEROP_TESTS=true SWIFT_VERSION=5.0.3