fix(cli): cleanup code and add missing dependencies

Author: armano2

@commitlint/cli/package.json

@@ -36,7 +36,10 @@
   },
   "license": "MIT",
   "devDependencies": {
+    "@types/execa": "^0.9.0",
     "@types/yargs": "^15.0.3",
+    "@commitlint/test": "8.2.0",
+    "@commitlint/utils": "^8.3.4",
     "execa": "0.11.0",
     "fs-extra": "^8.1.0"
   },

@commitlint/cli/src/cli.test.ts

@@ -11,7 +11,7 @@ interface TestOptions {
 	env?: Record<string, string>;
 }
 
-function cli(args: string[], options: TestOptions) {
+const cli = (args: string[], options: TestOptions) => {
 	return (input = '') => {
 		const c = execa(bin, args, {
 			cwd: options.cwd,
@@ -20,7 +20,7 @@ function cli(args: string[], options: TestOptions) {
 		});
 		return c.catch(err => err);
 	};
-}
+};
 
 const gitBootstrap = (fixture: string) => git.bootstrap(fixture, __dirname);
 const fixBootstrap = (fixture: string) => fix.bootstrap(fixture, __dirname);

@commitlint/cli/src/cli.ts

@@ -103,14 +103,14 @@ const cli = yargs
 			`[input] reads from stdin if --edit, --env, --from and --to are omitted`
 	).argv;
 
-main(cli).catch(err =>
+main(cli).catch(err => {
 	setTimeout(() => {
 		if (err.type === pkg.name) {
 			process.exit(1);
 		}
 		throw err;
 	}, 0)
-);
+});
 
 async function main(options: CliFlags) {
 	const raw = options._;