Update .travis.yml

pitfall/.travis.yml

@@ -9,8 +9,13 @@ env:
   global:
     - RACKET_DIR=~/racket
   matrix:
-    - RACKET_VERSION=6.10
+    - RACKET_VERSION=6.10    
+    - RACKET_VERSION=6.12
+    - RACKET_VERSION=7.0
+    - RACKET_VERSION=7.1
+    - RACKET_VERSION=7.2
     - RACKET_VERSION=HEAD
+    - RACKET_VERSION=HEADCS
 
 # You may want to test against certain versions of Racket, without
 # having them count against the overall success/failure.
@@ -29,5 +34,5 @@ before_install:
 
 script:
  - cd ..   # Travis did a cd into the dir. Back up, for the next:
-# - travis_retry raco pkg install --deps search-auto --link pitfall
-# - raco test -p pitfall
+ - travis_retry raco pkg install --deps search-auto --link pitfall
+ - raco test -p pitfall