fix: correct package.json exports format for Metro compatibility (#581)

Co-authored-by: Eli Zibin <1131641+zibs@users.noreply.github.com>

Author: TasseDeCafe

.changeset/brave-cherries-sing.md

@@ -0,0 +1,5 @@
+---
+"victory-native": minor
+---
+
+fix: update package.json exports format for Metro compatibility

lib/package.json

@@ -14,13 +14,13 @@
   "types": "dist/index.d.ts",
   "main": "dist/index.js",
   "exports": {
-    ".": [
-      {
-        "imports": "./dist/index.js",
-        "types": "./dist/index.d.ts"
-      },
-      "./dist/index.js"
-    ]
+    ".": {
+      "react-native": "./src/index.ts",
+      "types": "./dist/index.d.ts",
+      "import": "./dist/index.js",
+      "require": "./dist/index.js",
+      "default": "./src/index.ts"
+    }
   },
   "files": [
     "src",