Update .travis.yml

.travis.yml

@@ -13,22 +13,26 @@ env:
 #    - RACKET_VERSION=6.1
 #    - RACKET_VERSION=6.2
     - RACKET_VERSION=6.3
-    - RACKET_VERSION=6.4
-    - RACKET_VERSION=6.5
+#    - RACKET_VERSION=6.4
+#    - RACKET_VERSION=6.5
     - RACKET_VERSION=6.6
-    - RACKET_VERSION=6.7
-    - RACKET_VERSION=6.8
+#    - RACKET_VERSION=6.7
+#    - RACKET_VERSION=6.8
     - RACKET_VERSION=6.9
-    - RACKET_VERSION=6.10
-    - RACKET_VERSION=6.11
+#    - RACKET_VERSION=6.10
+#    - RACKET_VERSION=6.11
     - RACKET_VERSION=6.12
+    - RACKET_VERSION=7.0
+    - RACKET_VERSION=7.1
     - 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.
 matrix:
   allow_failures:
     #- env: RACKET_VERSION=HEAD
+    - env: RACKET_VERSION=HEADCS
   # Fast finish: Overall build result is determined as soon as any of
   # its rows have failed, or, all of its rows that aren't allowed to
   # fail have succeeded.