Re add lint.

Author: Novusvetus

package.json

@@ -8,9 +8,10 @@
     "build": "tsc",
     "format": "prettier --write **/*.ts",
     "format-check": "prettier --check **/*.ts",
+    "lint": "eslint src/**/*.ts",
     "package": "ncc build --source-map --license licenses.txt",
     "test": "jest --passWithNoTests",
-    "all": "npm run build && npm run format && npm run package && npm test"
+    "all": "npm run build && npm run format && npm run lint && npm run package && npm test"
   },
   "repository": {
     "type": "git",