update some deps to get tests to pass

package.json

@@ -48,12 +48,12 @@
   "homepage": "https://github.com/rollup/rollup",
   "devDependencies": {
     "acorn": "^4.0.1",
-    "buble": "^0.12.5",
+    "buble": "^0.15.1",
     "chalk": "^1.1.3",
     "codecov.io": "^0.1.6",
     "console-group": "^0.3.1",
-    "eslint": "^2.13.0",
+    "eslint": "^3.12.2",
-    "eslint-plugin-import": "^1.14.0",
+    "eslint-plugin-import": "^2.2.0",
     "estree-walker": "^0.2.1",
     "is-reference": "^1.0.0",
     "istanbul": "^0.4.3",