chore: use pnpm instead of yarn

Author: Garfield550

package.json

@@ -5,6 +5,7 @@
   "repository": "https://github.com/shuding/stable-hash",
   "author": "Shu Ding",
   "license": "MIT",
+  "packageManager": "[email protected]",
   "main": "./dist/index.js",
   "module": "./dist/index.mjs",
   "types": "./dist/index.d.ts",
@@ -20,7 +21,7 @@
     "build:mjs": "esbuild src/index.ts --minify --target=es6 --outdir=dist --out-extension:.js=.mjs",
     "build:cjs": "esbuild src/index.ts --minify --target=es6 --outdir=dist --format=cjs",
     "build:types": "tsc --emitDeclarationOnly --declaration -p tsconfig.build.json",
-    "build": "yarn build:mjs && yarn build:cjs && yarn build:types",
+    "build": "pnpm build:mjs && pnpm build:cjs && pnpm build:types",
     "test": "jest"
   },
   "devDependencies": {