replace wait with waitFor for puppeteer (#557)

Author: kentcdodds

docs/pptr-testing-library/intro.md

@@ -16,7 +16,7 @@ npm install --save-dev puppeteer pptr-testing-library
 
 ```js
 const puppeteer = require('puppeteer')
-const { getDocument, queries, wait } = require('pptr-testing-library')
+const { getDocument, queries, waitFor } = require('pptr-testing-library')
 
 const { getByTestId, getByLabelText } = queries
 
@@ -32,7 +32,7 @@ const $email = await getByLabelText($form, 'Email')
 // interact with puppeteer like usual
 await $email.type('pptr@example.com')
 // waiting works too!
-await wait(() => getByText('Loading...'))
+await waitFor(() => getByText('Loading...'))
 ```
 
 A little too un-puppeteer for you? You can attach all the `DOM Testing Library`