1.4.0 update readme, minify command, redundant changes

README.md

@@ -25,7 +25,7 @@ import 'fabric-history';
 
 Following commands will undo and redo the canvas.
 
-```
+```javascript
 canvas.undo();
 
 canvas.redo();
@@ -84,8 +84,21 @@ You can find an advanced example on demo folder.
 - history:clear
   - Fired when whole history cleared
 
+# Callbacks
+
+
+```javascript
+canvas.undo(function() { 
+  console.log('post undo');
+});
+
+canvas.redo(function() { 
+  console.log('post redo');
+});
+```
+
 # Functions
 
 - undo
 - redo
-- clear
+- clearHistory

demo/demo.html

@@ -35,7 +35,7 @@
 
     <script src="https://cdnjs.cloudflare.com/ajax/libs/fabric.js/3.4.0/fabric.min.js"></script>
     <script src="libs/jsonviewer.js"></script>
-    <script src="../src/index.js"></script>
+    <script src="../src/index.min.js"></script>
     <script>
         let isDrawingMode = false;
         const canvas = new fabric.Canvas(document.querySelector('canvas'));