[CI] Fix swiftenv

Author: norio-nomura

.travis.yml

@@ -31,7 +31,7 @@ aliases:
     dist: trusty
     language: generic
     install:
-      - eval "$(curl -sL https://gist.githubusercontent.com/kylef/5c0475ff02b7c7671d2a/raw/02090c7ede5a637b76e6df1710e83cd0bbe7dcdf/swiftenv-install.sh)"
+      - eval "$(curl -sL https://swiftenv.fuller.li/install.sh)"
 
 branches:
   only:
@@ -65,7 +65,7 @@ matrix:
       name: Linux / Swift 5.0 Development
       env:
         - JOB=Linux
-        - SWIFT_VERSION=5.0-DEVELOPMENT-SNAPSHOT-2019-03-05-a
+        - SWIFT_VERSION=5.0-DEVELOPMENT-SNAPSHOT-2019-02-28-a
 
 notifications:
   email: false