fix: add missing parameter for type of build function in fastify-cli/helper (#724)

* fix: add missing parameter for type of build in helper

* fix: make build options parameters optional

Author: zetaraku

README.md

@@ -346,9 +346,9 @@ There are two utilities provided:
 - `build`: builds your application and returns the `fastify` instance without calling the `listen` method.
 - `listen`: starts your application and returns the `fastify` instance listening on the configured port.
 
-Both of these utilities have the `function(arg, pluginOptions, serverOptions)` parameters:
+Both of these utilities have the `function(args, pluginOptions, serverOptions)` parameters:
 
-- `cliArgs`: is a string or a string array within the same arguments passed to the `fastify-cli` command.
+- `args`: is a string or a string array within the same arguments passed to the `fastify-cli` command.
 - `pluginOptions`: is an object containing the options provided to the started plugin (eg: `app.js`).
 - `serverOptions`: is an object containing the additional options provided to fastify server, similar to the `--options` command line argument
 

helper.d.ts

@@ -2,7 +2,7 @@ import fastify from 'fastify'
 
 declare module 'fastify-cli/helper.js' {
     module helper {
-        export function build(argv: Array<string>, config: Object): ReturnType<typeof fastify>;
+        export function build(args: Array<string>, additionalOptions?: Object, serverOptions?: Object): ReturnType<typeof fastify>;
     }
 
     export = helper;