Fix crash resolving ReScript v12+ binaries

findBinary passed a plain filesystem path to url.fileURLToPath, which
always throws ERR_INVALID_URL, crashing the language server on startup
for any ReScript >= 12.0.0-alpha.13 project. Convert the path with
url.pathToFileURL instead, which also keeps the dynamic import working
on Windows.

Fixes #1181

Author: jarednorman

CHANGELOG.md

@@ -14,6 +14,8 @@
 
 #### :bug: Bug fix
 
+- Fix language server crash (`ERR_INVALID_URL`) when resolving platform binaries for ReScript v12+ projects. https://github.com/rescript-lang/rescript-vscode/issues/1181
+
 #### :rocket: New Feature
 
 #### :house: Internal

shared/src/findBinary.ts

@@ -116,7 +116,9 @@ export const findBinary = async ({
       "..",
       `@rescript/${target}/bin.js`,
     );
-    const { binPaths } = await import(url.fileURLToPath(targetPackagePath));
+    const { binPaths } = await import(
+      url.pathToFileURL(targetPackagePath).href
+    );
 
     if (binary === "bsc.exe") {
       binaryPath = binPaths.bsc_exe;