chore(package/exports): use default instead of import (#1)

Author: kwaa

package.json

@@ -17,13 +17,14 @@
   "exports": {
     ".": {
       "types": "./dist/index.d.ts",
-      "import": "./dist/index.mjs"
+      "default": "./dist/index.mjs"
     },
     "./webgpu": {
       "types": "./dist/webgpu/index.d.ts",
-      "import": "./dist/webgpu/index.mjs"
+      "default": "./dist/webgpu/index.mjs"
     }
   },
+  "main": "./dist/index.mjs",
   "module": "./dist/index.mjs",
   "types": "./dist/index.d.ts",
   "files": [