Mention way to implement allowCreate functionality with Creatable

README.md

@@ -103,7 +103,7 @@ You can enable multi-value selection by setting `multi={true}`. In this mode:
 * The values of the selected items are joined using the `delimiter` prop to create the input value when `joinValues` is true
 * A simple value, if provided, will be split using the `delimiter` prop
 * The `onChange` event provides an array of selected options _or_ a comma-separated string of values (eg `"1,2,3"`) if `simpleValue` is true
-* By default, only options in the `options` array can be selected. Setting `allowCreate` to true allows new options to be created if they do not already exist. *NOTE:* `allowCreate` is not implemented in `1.0.0-beta`, if you need this option please stay on `0.9.x`.
+* By default, only options in the `options` array can be selected. Use the `Creatable` Component (which wraps `Select`) to allow new options to be created if they do not already exist. Hitting comma (','), ENTER or TAB will add a new option. Versions `0.9.x` and below provided a boolean attribute on the `Select` Component (`allowCreate`) to achieve the same functionality. It is no longer available starting with version `1.0.0`.
 * By default, selected options can be cleared. To disable the possibility of clearing a particular option, add `clearableValue: false` to that option:
 ```javascript
 var options = [