Normalize paths in sourcemap generation (#1085)

CHANGELOG.md

@@ -1,11 +1,13 @@
 # Rojo Changelog
 
 ## Unreleased
+* Fixed `sourcemap` command outputting paths with OS-specific path separators ([#1085])
 * Fixed nil -> nil properties showing up as failing to sync in plugin's patch visualizer ([#1081])
 * Changed the background of the server's in-browser UI to be gray instead of white ([#1080]) 
 * Fixed `Auto Connect Playtest Server` no longer functioning due to Roblox change ([#1066])
 * Added an update indicator to the version header when a new version of the plugin is available. ([#1069])
 
+[#1085]: https://github.com/rojo-rbx/rojo/pull/1085
 [#1081]: https://github.com/rojo-rbx/rojo/pull/1081
 [#1080]: https://github.com/rojo-rbx/rojo/pull/1080
 [#1049]: https://github.com/rojo-rbx/rojo/pull/1066

src/cli/sourcemap.rs

@@ -28,7 +28,10 @@ struct SourcemapNode<'a> {
     name: &'a str,
     class_name: Ustr,
 
-    #[serde(skip_serializing_if = "Vec::is_empty")]
+    #[serde(
+        skip_serializing_if = "Vec::is_empty",
+        serialize_with = "crate::path_serializer::serialize_vec_absolute"
+    )]
     file_paths: Vec<PathBuf>,
 
     #[serde(skip_serializing_if = "Vec::is_empty")]