added support for EDC's Early Math Microworld extension

HISTORY.md

@@ -6,6 +6,7 @@
     * text costumes library: new block to add a rectangular colored background with optional padding to a copy of a costume, for making "clickable buttons"
 * **Notable Changes:**
     * improved emoji handling for "length of text" reporter, thanks, Michael!
+    * added support for EDC's Early Math Microworld extension
 * **Notable Fixes:**
     * strings library: fixed an index range bug, thanks, Brian!
 * **Documentation Updates:**
@@ -14,6 +15,7 @@
 
 ### 2022-01-13
 * threads: improved emoji handling for "length of text" reporter, thanks, Michael!
+* extensions: added support for EDC's Early Math Microworld extension
 
 ### 2022-01-10
 * new dev version

snap.html

@@ -28,7 +28,7 @@
         <script src="src/sketch.js?version=2021-11-03"></script>
         <script src="src/video.js?version=2019-06-27"></script>
         <script src="src/maps.js?version=2021-06-15"></script>
-        <script src="src/extensions.js?version=2022-01-03"></script>
+        <script src="src/extensions.js?version=2022-01-13"></script>
         <script src="src/xml.js?version=2021-07-05"></script>
         <script src="src/store.js?version=2022-01-02"></script>
         <script src="src/locale.js?version=2022-01-10"></script>

src/extensions.js

@@ -33,7 +33,7 @@ Color, Process, contains*/
 
 /*jshint esversion: 11*/
 
-modules.extensions = '2022-January-03';
+modules.extensions = '2022-January-13';
 
 // Global stuff
 
@@ -44,7 +44,8 @@ var SnapExtensions = {
     urls: [ // allow-list of trusted servers
         'libraries/',
         'https://snap.berkeley.edu/',
-        'https://ecraft2learn.github.io/ai/' // Uni-Oxford, Ken Kahn
+        'https://ecraft2learn.github.io/ai/', // Uni-Oxford, Ken Kahn
+        'https://microworld.edc.org' // EDC, E. Paul Goldenberg
     ]
 };