Move estraverse to dependencies

Oops!  It's not just a devDependency!

Author: anko

package.json

@@ -35,7 +35,6 @@
   "license": "ISC",
   "devDependencies": {
     "LiveScript": "^1.3.1",
-    "estraverse": "^4.1.0",
     "rimraf": "^2.4.1",
     "tape": "^4.0.0",
     "tests-ex-markdown": "^2.0.0",
@@ -45,6 +44,7 @@
     "chalk": "^1.1.1",
     "concat-stream": "^1.4.7",
     "escodegen": "^1.4.1",
+    "estraverse": "^4.1.0",
     "esutils": "^2.0.2",
     "esvalid": "1.1.0",
     "nopt": "^3.0.3",