fix: add prop-types package, add description, bump types (#234)

packages/paste-core/utilities/flex/package.json

@@ -1,9 +1,9 @@
 {
   "name": "@twilio-paste/flex",
-  "version": "0.0.0",
+  "version": "0.0.1",
   "category": "layout",
-  "status": "alpha",
-  "description": "",
+  "status": "beta",
+  "description": "A primitive component that can be used to build flexbox based elements and layouts.",
   "author": "Twilio Inc.",
   "license": "MIT",
   "main:dev": "src/index.tsx",
@@ -28,14 +28,15 @@
   },
   "peerDependencies": {
     "@twilio-paste/box": "^1.1.0",
-    "@twilio-paste/types": "^2.1.1",
+    "@twilio-paste/types": "^2.1.2",
+    "prop-types": "^15.7.2",
     "react": "^16.8.6",
     "react-dom": "^16.8.6",
     "styled-system": "^5.1.2"
   },
   "devDependencies": {
     "@twilio-paste/box": "^1.1.0",
-    "@twilio-paste/types": "^2.1.1",
+    "@twilio-paste/types": "^2.1.2",
     "csstype": "^2.6.6",
     "rollup": "^1.16.2",
     "rollup-plugin-babel": "^4.3.3",