fix: use latest sf-plugins-core

Author: mdonnalley

package.json

@@ -5,10 +5,10 @@
   "author": "Thomas @amphro",
   "bugs": "https://github.com/salesforcecli/plugin-command-reference/issues",
   "dependencies": {
-    "@oclif/core": "^0.5.34",
-    "@salesforce/command": "^4.0.5",
+    "@oclif/core": "^0.5.38",
     "@salesforce/core": "^2.2.0",
     "@salesforce/kit": "^1.5.17",
+    "@salesforce/sf-plugins-core": "^0.0.23",
     "@salesforce/ts-types": "^1.5.20",
     "chalk": "^3.0.0",
     "handlebars": "^4.7.7",

src/commands/commandreference/generate.ts

@@ -7,7 +7,7 @@
 
 import * as os from 'os';
 import * as path from 'path';
-import { SfCommand } from '@salesforce/command';
+import { SfCommand } from '@salesforce/sf-plugins-core';
 import { Flags } from '@oclif/core';
 import { Plugin } from '@oclif/core/lib/interfaces/plugin';
 import { fs, Messages, SfdxError } from '@salesforce/core';
@@ -22,7 +22,7 @@ import { events, mergeDeep } from '../../utils';
 Messages.importMessagesDirectory(__dirname);
 const messages = Messages.loadMessages('@salesforce/plugin-command-reference', 'main');
 
-export default class CommandReferenceGenerate extends SfCommand {
+export default class CommandReferenceGenerate extends SfCommand<AnyJson> {
   public static description = messages.getMessage('commandDescription');
 
   public static flags = {