Add string[] to options defaultValue type (#1721)

Add string[] to Command.option() defaultValue type.


Co-authored-by: Caleb ツ Everett <[email protected]>

Author: everett1992

typings/index.d.ts

@@ -523,21 +523,21 @@ export class Command {
    *
    * @returns `this` command for chaining
    */
-  option(flags: string, description?: string, defaultValue?: string | boolean): this;
+  option(flags: string, description?: string, defaultValue?: string | boolean | string[]): this;
   option<T>(flags: string, description: string, fn: (value: string, previous: T) => T, defaultValue?: T): this;
   /** @deprecated since v7, instead use choices or a custom function */
-  option(flags: string, description: string, regexp: RegExp, defaultValue?: string | boolean): this;
+  option(flags: string, description: string, regexp: RegExp, defaultValue?: string | boolean | string[]): this;
 
   /**
    * Define a required option, which must have a value after parsing. This usually means
    * the option must be specified on the command line. (Otherwise the same as .option().)
    *
    * The `flags` string contains the short and/or long flags, separated by comma, a pipe or space.
    */
-  requiredOption(flags: string, description?: string, defaultValue?: string | boolean): this;
+  requiredOption(flags: string, description?: string, defaultValue?: string | boolean | string[]): this;
   requiredOption<T>(flags: string, description: string, fn: (value: string, previous: T) => T, defaultValue?: T): this;
   /** @deprecated since v7, instead use choices or a custom function */
-  requiredOption(flags: string, description: string, regexp: RegExp, defaultValue?: string | boolean): this;
+  requiredOption(flags: string, description: string, regexp: RegExp, defaultValue?: string | boolean | string[]): this;
 
   /**
    * Factory routine to create a new unattached option.