update babel alpha 12, fixes build issues (#583)

.babelrc

@@ -6,10 +6,10 @@
       "targets": {
         "node": "4.2"
       }
-    }]
+    }],
+    "flow"
   ],
   "plugins": [
-    "transform-flow-strip-types",
     "external-helpers"
   ],
   "env": {
@@ -20,7 +20,8 @@
           "targets": {
             "node": "current"
           }
-        }]
+        }],
+        "flow"
       ]
     },
     "test": {

.eslintrc

@@ -1,4 +1,5 @@
 {
+  "root": true,
   "extends": "babel",
   "env": {
     "node": true

package.json

@@ -22,23 +22,23 @@
   },
   "devDependencies": {
     "ava": "^0.19.0",
-    "babel-cli": "7.0.0-alpha.9",
-    "babel-eslint": "^7.0.0",
-    "babel-helper-fixtures": "7.0.0-alpha.9",
-    "babel-plugin-external-helpers": "7.0.0-alpha.9",
+    "babel-cli": "7.0.0-alpha.12",
+    "babel-eslint": "8.0.0-alpha.13",
+    "babel-helper-fixtures": "7.0.0-alpha.12",
+    "babel-plugin-external-helpers": "7.0.0-alpha.12",
     "babel-plugin-istanbul": "^4.0.0",
-    "babel-plugin-transform-flow-strip-types": "7.0.0-alpha.9",
-    "babel-preset-env": "^1.5.1",
+    "babel-preset-flow": "7.0.0-alpha.12",
+    "babel-preset-env": "2.0.0-alpha.12",
     "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",
+    "eslint": "^4.0.0",
+    "eslint-config-babel": "^7.0.0",
+    "eslint-plugin-flowtype": "^2.34.0",
     "flow-bin": "^0.47.0",
     "nyc": "^11.0.2",
     "rimraf": "^2.5.4",
     "rollup": "^0.42.0",
-    "rollup-plugin-babel": "^2.6.1",
+    "rollup-plugin-babel": "3.0.0-alpha.12",
     "rollup-plugin-node-resolve": "^3.0.0",
     "rollup-watch": "^4.0.0",
     "unicode-9.0.0": "~0.7.0"