add 5.1.1 source release
diff --git a/js/download.js b/js/download.js
index a5490e5..61682d6 100644
--- a/js/download.js
+++ b/js/download.js
@@ -1,6 +1,14 @@
 // $.getJSON("https://api.github.com/repos/apache/echarts/releases").done(function (param) {
     // `yyyy-MM-dd` should be correct. `hh:mm:ss` doesn't matter.
     var param = [{
+        publishedAt: '2021-04-27T00:00:00Z',
+        prerelease: false,
+        name: '5.1.1'
+    }, {
+        publishedAt: '2021-04-15T00:00:00Z',
+        prerelease: false,
+        name: '5.1.0'
+    }, {
         publishedAt: '2021-02-06T00:00:00Z',
         prerelease: false,
         name: '5.0.2'