Stop packages from being duplicated + add flow check

Author: Artem

package.json

@@ -1,6 +1,6 @@
 {
   "name": "@foxcomm/storefront-react",
-  "version": "1.2.3",
+  "version": "1.3.0",
   "description": "FoxCommerce Storefront React UI Library",
   "main": "lib/index.js",
   "scripts": {
@@ -9,7 +9,7 @@
     "build": "npm run build-css && npm run build-js",
     "prepublish": "npm run build",
     "styleguidist": "NODE_PATH=./src styleguidist server --config styleguide.config.js",
-    "test": "echo \"Error: no test specified\" && exit 1"
+    "flow": "flow check"
   },
   "publishConfig": {
     "registry": "https://npm.foxcommerce.com:4873"
@@ -65,6 +65,10 @@
     "style-loader": "^0.17.0",
     "webpack": "^2.5.1"
   },
+  "peerDependencies": {
+    "react": "^15.5.4",
+    "react-dom": "^15.5.4"
+  },
   "dependencies": {
     "@foxcomm/api-js": "^1.2.0",
     "@foxcomm/wings": "^1.9.12",
@@ -79,8 +83,6 @@
     "postcss-css-variables": "^0.7.0",
     "postcss-import": "^10.0.0",
     "postcss-nested": "^2.0.2",
-    "react": "^15.5.4",
-    "react-dom": "^15.5.4",
     "react-image-gallery": "^0.8.0",
     "react-redux": "^5.0.5",
     "react-router": "2",