update dependencies

package.json

@@ -41,31 +41,30 @@
   },
   "homepage": "https://github.com/rollup/rollup",
   "devDependencies": {
-    "acorn": "^3.1.0",
-    "babel-core": "^5.8.32",
-    "buble": "^0.6.4",
-    "chalk": "^1.1.1",
+    "acorn": "^3.2.0",
+    "buble": "^0.11.5",
+    "chalk": "^1.1.3",
     "codecov.io": "^0.1.6",
-    "console-group": "^0.2.0",
-    "eslint": "^2.9.0",
-    "estree-walker": "^0.2.0",
-    "istanbul": "^0.4.0",
+    "console-group": "^0.2.1",
+    "eslint": "^2.13.0",
+    "estree-walker": "^0.2.1",
+    "istanbul": "^0.4.3",
     "magic-string": "^0.15.1",
     "minimist": "^1.2.0",
-    "mocha": "^2.3.3",
-    "remap-istanbul": "^0.5.1",
+    "mocha": "^2.5.3",
+    "remap-istanbul": "^0.6.4",
     "require-relative": "^0.8.7",
-    "rollup": "^0.29.1",
-    "rollup-plugin-buble": "^0.6.0",
+    "rollup": "^0.31.2",
+    "rollup-plugin-buble": "^0.11.0",
     "rollup-plugin-commonjs": "^3.0.0",
     "rollup-plugin-json": "^2.0.0",
-    "rollup-plugin-node-resolve": "^1.5.0",
-    "rollup-plugin-replace": "^1.0.1",
+    "rollup-plugin-node-resolve": "^1.7.0",
+    "rollup-plugin-replace": "^1.1.0",
     "rollup-plugin-string": "^2.0.0",
-    "sander": "^0.5.0",
-    "source-map": "^0.5.3",
-    "sourcemap-codec": "^1.2.1",
-    "uglify-js": "^2.6.1"
+    "sander": "^0.5.1",
+    "source-map": "^0.5.6",
+    "sourcemap-codec": "^1.3.0",
+    "uglify-js": "^2.6.2"
   },
   "dependencies": {
     "source-map-support": "^0.4.0"