[Dev Deps] update babel to use airbnb preset

Author: ljharb

.babelrc

@@ -1,17 +1,17 @@
 {
-  "presets": [ "es2015-argon" ],
+  "presets": ["airbnb"],
   "sourceMaps": "inline",
   "retainLines": true,
   "env": {
     "test": {
       "plugins": [
         "istanbul",
-        [ "module-resolver", { "root": [ "./src/" ] } ]
+        ["module-resolver", { "root": ["./src/"] }],
       ]
     },
     "testCompiled": {
       "plugins": [
-        [ "module-resolver", { "root": [ "./lib/" ] } ]
+        ["module-resolver", { "root": ["./lib/"] }],
       ]
     }
   }

package.json

@@ -63,6 +63,7 @@
     "babel-eslint": "=8.0.3 || ^8.2.6",
     "babel-plugin-istanbul": "^4.1.6",
     "babel-plugin-module-resolver": "^2.7.1",
+    "babel-preset-airbnb": "^2.6.0",
     "babel-preset-es2015-argon": "latest",
     "babel-preset-flow": "^6.23.0",
     "babel-register": "^6.26.0",