Copy README to graphql-hooks on publish (#98)

### What does this PR do?
- Ensures the readme appears on npm for `graphql-hooks`
- Copies LICENSE file to packages when publishing
- Updates CONTRIBUTING.md with `NPM_CONFIG_OTP` var

### Checklist

- [x] I have checked the [contributing document](../blob/master/CONTRIBUTING.md)
- [x] I have added or updated any relevant documentation
- [x] I have added or updated any relevant tests

CONTRIBUTING.md

@@ -60,7 +60,7 @@ For more information on `@all-contributors` see it's [usage docs](https://allcon
 ### Release process:
 
 - `npm test`
-- `npm run release`
+- `NPM_CONFIG_OTP=<your-otp> npm run release`
 
 Follow the prompts from [`lerna publish`](https://lernajs.io/#command-publish)
 

packages/graphql-hooks-memcache/package.json

@@ -4,7 +4,9 @@
   "description": "In memory cache for graphql-hooks",
   "main": "index.js",
   "scripts": {
-    "test": "echo \"Error: no test specified\" && exit 1"
+    "test": "echo \"Error: no test specified\" && exit 1",
+    "prepublishOnly": "cp ../../LICENSE .",
+    "postpublish": "rm ./LICENSE"
   },
   "keywords": [
     "graphql",

packages/graphql-hooks-ssr/package.json

@@ -4,7 +4,9 @@
   "description": "Server side rendering utils for graphql-hooks",
   "main": "index.js",
   "scripts": {
-    "test": "echo \"Error: no test specified\" && exit 0"
+    "test": "echo \"Error: no test specified\" && exit 0",
+    "prepublishOnly": "cp ../../LICENSE .",
+    "postpublish": "rm ./LICENSE"
   },
   "keywords": [
     "graphql",

packages/graphql-hooks/package.json

@@ -7,7 +7,8 @@
   "unpkg": "dist/graphql-hooks.min.js",
   "scripts": {
     "build": "rollup -c",
-    "prepublishOnly": "npm run build"
+    "prepublishOnly": "npm run build && cp ../../README.md . && cp ../../LICENSE .",
+    "postpublish": "rm README.md && rm LICENSE"
   },
   "files": [
     "dist",