Typescript definitions (#25)

* Added type definitions

* Handler only has exactly one or no argument

* Moved type defs to root folder

1 files changed, 8 insertions, 0 deletions

diff --git a/README.md b/README.md
index 7eb97f5..1a687ba 100644
--- a/README.md
+++ b/README.md
@@ -71,6 +71,12 @@ emitter.on('foo', onFoo)   // listen
 emitter.off('foo', onFoo)  // unlisten
 ```
 
+### Typescript
+```ts
+import * as mitt from 'mitt';
+let emitter: mitt.Emitter = new mitt();
+```
+
 ## Examples & Demos
 
 <a href="http://codepen.io/developit/pen/rjMEwW?editors=0110">
@@ -79,6 +85,8 @@ emitter.off('foo', onFoo)  // unlisten
   <img src="https://i.imgur.com/CjBgOfJ.png" width="278" alt="preact + mitt preview">
 </a>
 
+* * *
+
 ## API
 
 ### mitt