build: add back babel-preset-stage-1

Author: jedwards1211

.babelrc

@@ -1,11 +1,12 @@
 {
   "presets": [
-    "flow"
+    "stage-1", "flow"
   ],
   "env": {
     "test": {
       "presets": [
-        ["env", {"targets": {"node": "current"}}]
+        ["env", {"targets": {"node": "current"}}],
+        "stage-1", "flow"
       ],
       "plugins": [
         "transform-runtime",
@@ -14,7 +15,8 @@
     },
     "es5": {
       "presets": [
-        ["env", {"forceAllTransforms": true}]
+        ["env", {"forceAllTransforms": true}],
+        "stage-1", "flow"
       ],
       "plugins": [
         "transform-runtime"

package.json

@@ -65,7 +65,7 @@
     "babel-plugin-transform-runtime": "^6.23.0",
     "babel-preset-env": "^1.7.0",
     "babel-preset-flow": "^6.23.0",
-    "babel-preset-stage-1": "^6.22.0",
+    "babel-preset-stage-1": "^6.24.1",
     "babel-register": "^6.23.0",
     "babel-runtime": "^6.23.0",
     "chai": "^4.1.2",