Fix JS deprecations

Author: Firobe

src/lib/crypto/kimchi_bindings/js/node_js/node_backend.js

@@ -34,6 +34,16 @@ var wasm_ready = function(wasm) {
     wasm.wbg_rayon_start_worker(worker_threads.workerData.receiver);
 };
 
+// This function was previously exported by JSOO but was removed.
+// It is now copied here.
+// Provides: caml_js_export_var
+function caml_js_export_var (){
+  if(typeof module !== 'undefined' && module && module.exports)
+    return module.exports
+  else
+    return globalThis;
+}
+
 // Provides: startWorkers
 // Requires: worker_threads, _workers, caml_js_export_var
 var startWorkers = (function() {

src/lib/snarky_js_bindings/lib/snarky_js_bindings_lib.ml

@@ -14,8 +14,7 @@ let console_log_string s = Js_of_ocaml.Firebug.console##log (Js.string s)
 let console_log s = Js_of_ocaml.Firebug.console##log s
 
 let raise_error s =
-  let s = Js.string s in
-  Js.raise_js_error (new%js Js.error_constr s)
+  Js_error.(raise_ @@ of_error (new%js Js.error_constr (Js.string s)))
 
 let raise_errorf fmt = Core_kernel.ksprintf raise_error fmt