deprecate Exn module

Author: aspeddro

CHANGELOG.md

@@ -2,7 +2,7 @@
 
 ## Next version
 
-- BREAKING: Remove `Exn` module. https://github.com/rescript-association/rescript-core/pull/230
+- Deprecated `Exn` module. Use the `Error` module instead. https://github.com/rescript-association/rescript-core/pull/230
 
 ## 1.5.2
 

src/RescriptCore.mjs

@@ -82,6 +82,8 @@ var $$BigUint64Array;
 
 var $$Intl;
 
+var Exn;
+
 var $$Option;
 
 var List;
@@ -131,6 +133,7 @@ export {
   $$BigInt64Array ,
   $$BigUint64Array ,
   $$Intl ,
+  Exn ,
   $$Option ,
   List ,
   Result ,

src/RescriptCore.res

@@ -94,6 +94,9 @@ async function main() {
 */
 external import: 'a => promise<'a> = "#import"
 
+@deprecated("Use `Error` module instead")
+module Exn = Js.Exn
+
 module Option = Core__Option
 module List = Core__List
 module Result = Core__Result