Remove -pre versions from package.json

Also pin Travis to Firefox 51

.travis.yml

@@ -2,4 +2,6 @@ language: node_js
 node_js: node
 before_install:
   - "export DISPLAY=:99.0"
-  - "sh -e /etc/init.d/xvfb start"
+  - "sh -e /etc/init.d/xvfb start"
+addons:
+  firefox: "51.0"

package.json

@@ -35,24 +35,24 @@
     ]
   },
   "dependencies": {
-    "can-compute": "^3.1.0-pre.9",
-    "can-define": "^1.2.0-pre.4",
-    "can-event": "^3.5.0-pre.2",
-    "can-observation": "^3.2.0-pre.11",
-    "can-types": "^1.1.0-pre.2",
-    "can-util": "^3.9.0-pre.4",
+    "can-compute": "^3.2.0",
+    "can-define": "^1.2.0",
+    "can-event": "^3.5.0",
+    "can-observation": "^3.2.0",
+    "can-types": "^1.1.0",
+    "can-util": "^3.9.0",
     "kefir": "^3.5.1"
   },
   "devDependencies": {
     "bit-docs": "0.0.7",
-    "done-serve": "^0.2.4",
-    "donejs-cli": "^0.9.5",
+    "done-serve": "^1.2.4",
+    "donejs-cli": "^1.0.2",
     "generator-donejs": "^0.9.0",
     "jshint": "^2.9.1",
     "steal": "^1.2.10",
     "steal-qunit": "^1.0.1",
     "steal-tools": "^1.1.2",
-    "testee": "^0.3.1"
+    "testee": "^0.6.1"
   },
   "repository": {
     "type": "git",