Add GitHub as author

Update description

README.md

@@ -27,13 +27,13 @@ documentation.
 
 ```yaml
 on:
-  issue: {type: opened}
+  issues: {types: opened}
 
 jobs:
   comment:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/github-script@0.2.0
+      - uses: actions/github-script@0.3.0
         with:
           github-token: ${{github.token}}
           script: |
@@ -44,7 +44,7 @@ jobs:
 
 ```yaml
 on:
-  issue: {type: opened}
+  issues: {types: opened}
 
 jobs:
   apply-label:
@@ -92,3 +92,28 @@ jobs:
 
             await github.issues.createComment({...context.issue, body: 'Welcome, new contributor!'})
 ```
+
+### Download data from a URL
+
+You can use the `github` object to access the Octokit API. For
+instance, `github.request`
+
+```yaml
+on:
+  pull_request
+
+jobs:
+  diff:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/github-script@0.2.0
+        with:
+          github-token: ${{github.token}}
+          script: |
+            const diff_url = context.payload.pull_request.diff_url
+            const result = await github.request(diff_url)
+            console.log(result)
+```
+
+This will print the full diff object in the screen; `result.data` will
+contain the actual diff text.

action.yml

@@ -1,5 +1,6 @@
 name: GitHub Script
-description: An action for running simple scripts with a GitHub client
+author: GitHub
+description: Run simple scripts using the GitHub client
 branding:
   color: blue
   icon: code

main.js

@@ -16,8 +16,8 @@ async function main() {
   if (previews != null) opts.previews = previews.split(',')
   const client = new GitHub(token, opts)
   const script = core.getInput('script', {required: true})
-  const fn = new AsyncFunction('github', 'context', script)
+  const fn = new AsyncFunction('require', 'github', 'context', script)
-  const result = await fn(client, context)
+  const result = await fn(require, client, context)
   core.setOutput('result', JSON.stringify(result))
 }