chore(dev-deps): bump @oclif/plugin-help from 5.1.19 to 5.1.20 (#478)

Bumps [@oclif/plugin-help](https://github.com/oclif/plugin-help) from 5.1.19 to 5.1.20.
- [Release notes](https://github.com/oclif/plugin-help/releases)
- [Changelog](https://github.com/oclif/plugin-help/blob/main/CHANGELOG.md)
- [Commits](oclif/plugin-help@5.1.19...5.1.20)

---
updated-dependencies:
- dependency-name: "@oclif/plugin-help"
  dependency-type: direct:development
  update-type: version-update:semver-patch
...

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

Signed-off-by: dependabot[bot] <support@github.com>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

package.json

@@ -18,7 +18,7 @@
     "tar-fs": "^2.1.1"
   },
   "devDependencies": {
-    "@oclif/plugin-help": "^5.1.19",
+    "@oclif/plugin-help": "^5.1.20",
     "@oclif/test": "^2.2.13",
     "@types/chai": "^4.3.4",
     "@types/cross-spawn": "^6.0.2",

yarn.lock

@@ -471,12 +471,12 @@
   resolved "https://registry.yarnpkg.com/@oclif/linewrap/-/linewrap-1.0.0.tgz#aedcb64b479d4db7be24196384897b5000901d91"
   integrity sha512-Ups2dShK52xXa8w6iBWLgcjPJWjais6KPJQq3gQ/88AY6BXoTX+MIGFPrWQO1KLMiQfoTpcLnUwloN4brrVUHw==
 
-"@oclif/plugin-help@^5.1.10", "@oclif/plugin-help@^5.1.19":
-  version "5.1.19"
-  resolved "https://registry.yarnpkg.com/@oclif/plugin-help/-/plugin-help-5.1.19.tgz#43051772fefafe9bfe8823e2298103feb351b9c7"
-  integrity sha512-eQVRCFJOwRj8Tbqz8Lzd9GN38egwLCg+ohJ0xfg12CoXml03WqkfcFiAWkVwSWmLVrZUlUVrxfXKKkmpUaXZHg==
+"@oclif/plugin-help@^5.1.10", "@oclif/plugin-help@^5.1.20":
+  version "5.1.20"
+  resolved "https://registry.yarnpkg.com/@oclif/plugin-help/-/plugin-help-5.1.20.tgz#eba25a93266c271c7bbd08034bf53975f022476e"
+  integrity sha512-N8xRxE/isFcdBDI8cobixEZA5toxIK5jbxpwALNTr4s8KNAtBA3ORQrSiY0fWGkcv0sCGMwZw7rJ0Izh18JPsw==
   dependencies:
-    "@oclif/core" "^1.20.4"
+    "@oclif/core" "^1.21.0"
 
 "@oclif/plugin-not-found@^2.2.4":
   version "2.3.1"