Update offline-github-changelog to version 2.4.0

Author: depfu[bot]

package.json

@@ -56,7 +56,7 @@
     "eslint-plugin-standard": "^5.0.0",
     "mocha": "^8.2.1",
     "nyc": "^15.0.0",
-    "offline-github-changelog": "^1.7.0",
+    "offline-github-changelog": "^2.4.0",
     "prettier": "~2.5.0",
     "rollup-plugin-commonjs": "^10.1.0",
     "rollup-plugin-json": "^4.0.0",