chore: save dva-ast as dependencies

Author: sorrycc

package.json

@@ -18,6 +18,7 @@
   "dependencies": {
     "chalk": "^1.1.3",
     "commander": "^2.9.0",
+    "dva-ast": "^0.3.1",
     "empty-dir": "^0.2.1",
     "fs-extra": "^0.30.0",
     "left-pad": "^1.1.3",