feat: allow async config file (#9)

* Allow async config file exports

This allows config files to be CommonJS files that pull in connection details from ESM files using dynamic imports

* fix(types): update `config` resolver

Co-authored-by: Luke Edwards <[email protected]>

Author: TehShrike

bin.js

@@ -10,7 +10,7 @@ function wrap(act) {
 	return async (opts, tmp) => {
 		if (tmp = local(opts.config, opts.cwd)) {
 			$.info('Loading configuration');
-			opts.config = typeof tmp === 'function' ? tmp() : tmp;
+			opts.config = await (typeof tmp === 'function' ? tmp() : tmp);
 		}
 		await ley[act](opts).then(done).catch($.bail);
 	};

ley.d.ts

@@ -1,6 +1,6 @@
 declare namespace Options {
 	declare type Config = Record<string, unknown>;
-	declare type Resolver = () => Config;
+	declare type Resolver = Promise<Config> | () => Config;
 
 	declare interface Base {
 		cwd?: string;