use c8

Author: ota-meshi

package.json

@@ -30,8 +30,8 @@
     "build": "pnpm run build:meta && pnpm run build:tsc",
     "build:meta": "pnpm run ts ./tools/update-meta.ts",
     "build:tsc": "tsc --project ./tsconfig.build.json",
-    "clean": "rimraf .nyc_output lib coverage",
-    "cover": "nyc --reporter=lcov pnpm run test",
+    "clean": "rimraf lib coverage",
+    "cover": "c8 --reporter=lcov pnpm run test",
     "debug": "pnpm run mocha \"tests/src/**/*.ts\" --reporter dot --timeout 60000",
     "eslint-fix": "pnpm run lint --fix",
     "lint": "eslint .",
@@ -79,6 +79,7 @@
     "@typescript-eslint/parser": "~8.16.0",
     "@typescript-eslint/types": "~8.16.0",
     "benchmark": "^2.1.4",
+    "c8": "^10.1.2",
     "chai": "^4.5.0",
     "env-cmd": "^10.1.0",
     "esbuild": "^0.24.0",
@@ -100,7 +101,6 @@
     "magic-string": "^0.30.14",
     "mocha": "^10.8.2",
     "mocha-chai-jest-snapshot": "^1.1.6",
-    "nyc": "^17.1.0",
     "prettier": "~3.4.1",
     "prettier-plugin-pkg": "^0.18.1",
     "prettier-plugin-svelte": "^3.3.2",