build(deps): bump fast-json-stringify from 2.1.0 to 2.2.1

Bumps [fast-json-stringify](https://github.com/fastify/fast-json-stringify) from 2.1.0 to 2.2.1.
- [Release notes](https://github.com/fastify/fast-json-stringify/releases)
- [Commits](fastify/fast-json-stringify@v2.1.0...v2.2.1)

Signed-off-by: dependabot-preview[bot] <support@dependabot.com>

Author: dependabot-preview[bot]

package.json

@@ -55,7 +55,7 @@
     "colors": "^1.1.2",
     "commander": "^5.1.0",
     "cron": "^1.3.0",
-    "fast-json-stringify": "^2.1.0",
+    "fast-json-stringify": "^2.2.1",
     "humanize-number": "^0.0.2",
     "kcors": "^2.2.1",
     "koa": "2.12.1",

yarn.lock

@@ -2458,10 +2458,10 @@ fast-json-stable-stringify@^2.0.0:
   resolved "http://registry.npm.taobao.org/fast-json-stable-stringify/download/fast-json-stable-stringify-2.0.0.tgz#d5142c0caee6b1189f87d3a76111064f86c8bbf2"
   integrity sha1-1RQsDK7msRifh9OnYREGT4bIu/I=
 
-fast-json-stringify@^2.1.0:
-  version "2.1.0"
-  resolved "https://registry.yarnpkg.com/fast-json-stringify/-/fast-json-stringify-2.1.0.tgz#b29e37ffcda8f58330624c7e5eed8da585926073"
-  integrity sha512-fXHU/VG0QmGzV4IRCKzyuctb5qCXyk8OVARmDpV0u5wZHXwRGU2TFFVT2+UD8+mo24siVAmTygVF2IzfXSzK2w==
+fast-json-stringify@^2.2.1:
+  version "2.2.1"
+  resolved "https://registry.yarnpkg.com/fast-json-stringify/-/fast-json-stringify-2.2.1.tgz#bf429cc5ae126efadf33d283e5b0eb42c0823976"
+  integrity sha512-5s4KScgFR3cmrAoMip9K1m+oP9OsMtU8pG2oNbztbGKS9Xn4oDyPXdqefjpeMrZU4wgGga6/jyIOasghBPcpcQ==
   dependencies:
     ajv "^6.11.0"
     deepmerge "^4.2.2"