Use preset-env and update other dependencies (#562)

.babelrc

@@ -1,10 +1,12 @@
 {
   "presets": [
-    ["es2015", {
+    ["env", {
       "loose": true,
-      "modules": false
-    }],
-    "stage-0"
+      "modules": false,
+      "targets": {
+        "node": "4.2"
+      }
+    }]
   ],
   "plugins": [
     "transform-flow-strip-types",
@@ -13,10 +15,12 @@
   "env": {
     "watch": {
       "presets": [
-        ["es2015", {
-          "loose": true
-        }],
-        "stage-0"
+        ["env", {
+          "loose": true,
+          "targets": {
+            "node": "current"
+          }
+        }]
       ]
     },
     "test": {

package.json

@@ -28,17 +28,16 @@
     "babel-plugin-external-helpers": "7.0.0-alpha.9",
     "babel-plugin-istanbul": "^4.0.0",
     "babel-plugin-transform-flow-strip-types": "7.0.0-alpha.9",
-    "babel-preset-es2015": "7.0.0-alpha.9",
-    "babel-preset-stage-0": "7.0.0-alpha.9",
+    "babel-preset-env": "^1.5.1",
     "chalk": "^1.1.3",
     "cross-env": "^5.0.0",
     "eslint": "^3.7.1",
     "eslint-config-babel": "^6.0.0",
     "eslint-plugin-flowtype": "^2.20.0",
     "flow-bin": "^0.47.0",
-    "nyc": "^10.0.0",
+    "nyc": "^11.0.2",
     "rimraf": "^2.5.4",
-    "rollup": "^0.41.0",
+    "rollup": "^0.42.0",
     "rollup-plugin-babel": "^2.6.1",
     "rollup-plugin-node-resolve": "^3.0.0",
     "rollup-watch": "^3.2.2",