fix: allow tests to pass when no test files exist

Author: liueic

package.json

@@ -46,7 +46,7 @@
     "watch": "tsc -w",
     "dev": "ts-node src/index.ts",
     "start": "node build/index.js",
-    "test": "jest",
+    "test": "jest --passWithNoTests",
     "prepublishOnly": "npm run build"
   },
   "dependencies": {