fix: regression in cli defaults

Author: DavidParks8

src/cli/main.ts

@@ -4,13 +4,19 @@ import * as program from 'commander';
 import * as path from 'path';
 import { createNgPackage, NgPackagrCliArguments } from './../lib/ng-packagr';
 
+const DEFAULT_PROJECT_PATH = path.resolve(process.cwd(), 'ng-package.json');
+
 function parseProjectPath(parsed: string): string {
-  return parsed || path.resolve(process.cwd(), 'ng-package.json');
+  return parsed || DEFAULT_PROJECT_PATH;
 }
 
 program
   .name('ng-packagr')
-  .option('-p, --project <path>', 'Path to the \'ng-package.json\' or \'package.json\' file.', parseProjectPath)
+  .option(
+    '-p, --project <path>',
+    'Path to the \'ng-package.json\' or \'package.json\' file.',
+    parseProjectPath,
+    DEFAULT_PROJECT_PATH)
   .parse(process.argv);
 
 const cliArguments: any = program;