Trigger CD on pre-releases (#1083)

Of course my first test of the CD job doesn't run at all!

Author: EzraBrooks

.github/workflows/cd.yml

@@ -2,7 +2,7 @@ name: CD
 
 on:
   release:
-    types: [released]
+    types: [released, prereleased]
 
 permissions:
   contents: read

package.json

@@ -2,7 +2,7 @@
   "name": "roslib",
   "homepage": "https://robotwebtools.github.io",
   "description": "The standard ROS Javascript Library",
-  "version": "2.0.0-alpha1",
+  "version": "2.0.0-alpha2",
   "license": "BSD-2-Clause",
   "files": [
     "dist"