test: add vitest config

package.json

@@ -26,7 +26,7 @@
   "sideEffects": false,
   "scripts": {
     "build": "tsc && bunchee --sourcemap",
-    "test": "vitest --coverage --coverage.all=false \"$@\"",
+    "test": "vitest --coverage \"$@\"",
     "lint": "eslint . --fix --cache",
     "lint:ci": "eslint . --max-warnings 0 --cache --cache-location ./node_modules/.cache/eslint/.eslintcache",
     "format": "prettier \"**/*.{json,md,yml}\" --write --log-level warn --cache",

vitest.config.mts

@@ -0,0 +1,15 @@
+import {coverageConfigDefaults, defineConfig} from "vitest/config";
+
+// @internal
+export default defineConfig({
+  test: {
+    coverage: {
+      all: false,
+      exclude: [
+        "src/errors.ts",
+        "src/utils/invariant.ts",
+        ...coverageConfigDefaults.exclude,
+      ],
+    },
+  },
+});