Make sure roswell is downloaded from the correct place

.travis.yml

@@ -4,7 +4,6 @@ env:
   global:
     - PATH=~/.roswell/bin:~/nginx/sbin:$PATH
     - LD_LIBRARY_PATH=$HOME/libuv/lib:$LD_LIBRARY_PATH
-    - ROSWELL_BRANCH=release
     - ROSWELL_INSTALL_DIR=$HOME/.roswell
     - COVERAGE_EXCLUDE=t
   matrix:
@@ -16,7 +15,7 @@ env:
 
 install:
   # Install Roswell
-  - curl -L https://raw.githubusercontent.com/snmsts/roswell/$ROSWELL_BRANCH/scripts/install-for-ci.sh | sh
+  - curl -L https://raw.githubusercontent.com/roswell/roswell/release/scripts/install-for-ci.sh | sh
   - ros asdf install
   - ros -e '(ql:update-all-dists :prompt nil)'
   - ros install prove