chore: upgrade graceful-fs to 4.2.1

Signed-off-by: BoHong Li <raccoon@hackmd.io>

Author: a60814billy

package.json

@@ -62,7 +62,7 @@
     "fork-awesome": "~1.1.7",
     "formidable": "~1.2.1",
     "gist-embed": "~2.6.0",
-    "graceful-fs": "~4.1.11",
+    "graceful-fs": "~4.2.1",
     "handlebars": "~4.0.13",
     "helmet": "~3.13.0",
     "highlight.js": "~9.12.0",

yarn.lock

@@ -6126,7 +6126,7 @@ good-listener@^1.2.2:
   dependencies:
     delegate "^3.1.2"
 
-graceful-fs@*, graceful-fs@^4.1.11, graceful-fs@^4.1.15, graceful-fs@^4.1.2, graceful-fs@^4.1.6, graceful-fs@^4.1.9, graceful-fs@~4.1.11:
+graceful-fs@*, graceful-fs@^4.1.11, graceful-fs@^4.1.15, graceful-fs@^4.1.2, graceful-fs@^4.1.6, graceful-fs@^4.1.9:
   version "4.1.15"
   resolved "https://registry.yarnpkg.com/graceful-fs/-/graceful-fs-4.1.15.tgz#ffb703e1066e8a0eeaa4c8b80ba9253eeefbfb00"
   integrity sha512-6uHUhOPEBgQ24HM+r6b/QwWfZq+yiFcipKFrOFiBEnWdy5sdzYoi+pJeQaPI5qOLRFqWmAXUPQNsielzdLoecA==
@@ -6136,6 +6136,11 @@ graceful-fs@^4.0.0, graceful-fs@^4.2.0:
   resolved "https://registry.yarnpkg.com/graceful-fs/-/graceful-fs-4.2.0.tgz#8d8fdc73977cb04104721cb53666c1ca64cd328b"
   integrity sha512-jpSvDPV4Cq/bgtpndIWbI5hmYxhQGHPC4d4cqBPb4DLniCfhJokdXhwhaDuLBGLQdvvRum/UiX6ECVIPvDXqdg==
 
+graceful-fs@~4.2.1:
+  version "4.2.1"
+  resolved "https://registry.yarnpkg.com/graceful-fs/-/graceful-fs-4.2.1.tgz#1c1f0c364882c868f5bff6512146328336a11b1d"
+  integrity sha512-b9usnbDGnD928gJB3LrCmxoibr3VE4U2SMo5PBuBnokWyDADTqDPXg4YpwKF1trpH+UbGp7QLicO3+aWEy0+mw==
+
 graphlibrary@^2.2.0:
   version "2.2.0"
   resolved "https://registry.yarnpkg.com/graphlibrary/-/graphlibrary-2.2.0.tgz#017a14899775228dec4497a39babfdd6bf56eac6"