merge fix

.circleci/config.yml

@@ -13,6 +13,7 @@ jobs:
           command: |
             python3 -m venv venv
             . venv/bin/activate
+            pip install --upgrade pip
             pip install -r gradio.egg-info/requires.txt
             pip install selenium==4.0.0a6.post2
       - save_cache:

gradio/static/js/interfaces/input/image.js

@@ -256,7 +256,7 @@ const image_input = {
     toDataURL(example_data, function(data) {
       if (io.source == "canvas") {
         io.clear();
-        let ctx = this.context;
+        let ctx = io.context;
         var img = new Image;
         let dimension = io.target.find(".canvas_holder canvas").width();
         img.onload = function(){