upgrade babel dependencies + config to support core-js@3 (#125)

* upgrade babel dependencies + config to support core-js@3 (likely a breaking change for core-js@2) * temporarily include core-js in dependencies * move core-js to devDependency
nytimes · May 20, 2019 · 16fecfd · 16fecfd
1 parent d7cc440
commit 16fecfd
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diff --git a/.babelrc b/.babelrc
@@ -5,9 +5,13 @@
     "@babel/plugin-proposal-object-rest-spread"
   ],
   "presets": [
-    ["@babel/preset-env", {
-      "useBuiltIns": "usage"
-    }],
+    [
+      "@babel/preset-env",
+      {
+        "useBuiltIns": "usage",
+        "corejs": 3
+      }
+    ],
     "@babel/preset-react"
   ]
 }