Depend on the published @maxonfjvipon/xslint, not the git URL

Now that xslint 0.0.10 is on npm with the lint API, pin the dependency to
^0.0.10 instead of github:maxonfjvipon/xslint, so an npm install of the server
pulls a proper semver-resolved package.

Author: maxonfjvipon

package-lock.json

@@ -22,7 +22,7 @@
     "lint": "eslint src test"
   },
   "dependencies": {
-    "@maxonfjvipon/xslint": "github:maxonfjvipon/xslint",
+    "@maxonfjvipon/xslint": "^0.0.10",
     "vscode-languageserver": "^9.0.1",
     "vscode-languageserver-textdocument": "^1.0.12"
   },