Bump OSS VS Code extension to 0.28.0

Summary: In preparation for a new OSS release.

Reviewed By: alanz

Differential Revision: D60673665

fbshipit-source-id: 5ecbb91dad39d0a62c1ac1d7cfb1cfbf400bab51

Author: robertoaloi

editors/code/package-lock.json

@@ -3,7 +3,7 @@
   "description": "Erlang language server",
   "author": "Meta Platforms, Inc",
   "license": "Apache2",
-  "version": "0.27.0",
+  "version": "0.28.0",
   "icon": "images/elp-logo-color.png",
   "homepage": "https://whatsapp.github.io/erlang-language-platform/",
   "repository": {