Merge pull request #1081 from mathjax/update/sre

Update/sre  (I'm just merging this; no need for back and forth about that).

Author: dpvc

package.json

@@ -141,6 +141,6 @@
     "mathjax-modern-font": "^4.0.0-beta.4",
     "mhchemparser": "^4.2.1",
     "mj-context-menu": "^0.9.1",
-    "speech-rule-engine": "^4.1.0-beta.8"
+    "speech-rule-engine": "^4.1.0-beta.9"
   }
 }