fix: tweak intlify/core conditional exports (#1639)

Author: kazupon

packages/core/package.json

@@ -54,6 +54,8 @@
   "exports": {
     ".": {
       "types": "./dist/core.d.ts",
+      "import": "./dist/core.mjs",
+      "browser": "./dist/core.esm-browser.js",
       "node": {
         "import": {
           "production": "./dist/core.prod.node.mjs",
@@ -65,9 +67,7 @@
           "development": "./dist/core.cjs",
           "default": "./index.js"
         }
-      },
-      "browser": "./dist/core.esm-browser.js",
-      "import": "./dist/core.mjs"
+      }
     },
     "./dist/*": "./dist/*",
     "./package.json": "./package.json"