chore: remove use of lodash/castArray

Author: peternhale

package.json

@@ -1,7 +1,7 @@
 {
   "name": "@oclif/core",
   "description": "base library for oclif CLIs",
-  "version": "1.1.2-test-09",
+  "version": "1.1.2",
   "author": "Salesforce",
   "bugs": "https://github.com/oclif/core/issues",
   "dependencies": {

src/cli-ux/action/base.ts

@@ -1,5 +1,5 @@
-import castArray from 'lodash/castArray'
 import {inspect} from 'util'
+import {castArray} from '../../util'
 
 export interface ITask {
   action: string;