fix: rollback plugin-help upgrade

Stay on v2 until sluggishness is resolved: oclif/plugin-help#101

Author: Sam Harrison

package.json

@@ -8,7 +8,7 @@
     "@oclif/command": "^1.7.0",
     "@oclif/config": "^1.16.0",
     "@oclif/errors": "^1.3.3",
-    "@oclif/plugin-help": "^3.1.0",
+    "@oclif/plugin-help": "^2.2.3",
     "@oclif/plugin-plugins": "^1.8.2",
     "axios": "^0.19.2",
     "chalk": "^4.1.0",