chore: update to rescript v12.0.1 and use official rescript-jest package

This commit includes:
- Upgrading ReScript from v12.0.0 to v12.0.1
- Switching from the GitHub fork to the official npm package for @glennsl/rescript-jest (v0.13.1)
- Removing the pinned-dependencies field from rescript.json

Author: dsiu

package.json

@@ -33,8 +33,7 @@
               {
                 "targets": {
                   "node": "current"
-                },
-                "modules": "commonjs"
+                }
               }
             ]
           ]
@@ -51,17 +50,17 @@
     ]
   },
   "peerDependencies": {
-    "rescript": "^12.0.0"
+    "rescript": "^12.0.1"
   },
   "devDependencies": {
     "@babel/core": "^7.28.5",
     "@babel/preset-env": "^7.28.5",
     "@changesets/cli": "^2.27.11",
-    "@glennsl/rescript-jest": "github:dsiu/rescript-jest#rescript-v12",
+    "@glennsl/rescript-jest": "^0.13.1",
     "babel-jest": "^27.3.1",
     "jest": "^27.3.1",
     "onchange": "^7.1.0",
-    "rescript": "^12.0.0",
+    "rescript": "^12.0.1",
     "tap-difflet": "^0.7.2"
   }
 }