Swap to babel-preset-env instead of babel-preset-es2015

Author: foxbenjaminfox

.babelrc

@@ -1,5 +1,5 @@
 {
   "presets": [
-    ["es2015", { "modules": false }]
+    "env"
   ]
 }

package-lock.json

@@ -12,7 +12,7 @@
     "lint": "eslint src test",
     "check": "npm run lint -s && dependency-check package.json --no-default-entries src/index.js",
     "watch": "watch 'npm run build' src test",
-    "test": "babel-node --presets es2015 test/index.js | tspec",
+    "test": "babel-node --presets env test/index.js | tspec",
     "prebuild": "npm run check -s && npm run clean -s && mkdirp dist",
     "build": "npm run rollup -s && npm run babel -s",
     "rollup": "rollup src/index.js --output.format umd --name AsyncComputed --output.file dist/vue-async-computed.esnext.js",
@@ -53,7 +53,7 @@
     "babel-core": "^6.26.3",
     "babel-eslint": "^8.2.5",
     "babel-istanbul": "^0.12.2",
-    "babel-preset-es2015": "^6.24.1",
+    "babel-preset-env": "^1.7.0",
     "coveralls": "^3.0.2",
     "dependency-check": "^3.1.0",
     "doctoc": "^1.3.1",