Add `to-arraybuffer` dependency

Used for converting Node.js buffers to `ArrayBuffer`.

package.json

@@ -78,6 +78,7 @@
     "spellchecker": "^3.4.4",
     "testcheck": "^1.0.0-rc.2",
     "tmp": "^0.0.33",
+    "to-arraybuffer": "^1.0.1",
     "websocket": "^1.0.25"
   },
   "devDependencies": {

yarn.lock

@@ -5442,6 +5442,10 @@ tmp@^0.0.33:
   dependencies:
     os-tmpdir "~1.0.2"
 
+to-arraybuffer@^1.0.1:
+  version "1.0.1"
+  resolved "https://registry.yarnpkg.com/to-arraybuffer/-/to-arraybuffer-1.0.1.tgz#7d229b1fcc637e466ca081180836a7aabff83f43"
+
 to-double-quotes@^2.0.0:
   version "2.0.0"
   resolved "https://registry.yarnpkg.com/to-double-quotes/-/to-double-quotes-2.0.0.tgz#aaf231d6fa948949f819301bbab4484d8588e4a7"