fix: Respect 'direct' option correctly

lib/index.js

@@ -240,7 +240,7 @@ const flatten = function flatten(options) {
     /*istanbul ignore else*/
     if (json.dependencies) {
         Object.keys(json.dependencies).forEach((name) => {
-            const childDependency = json.dependencies[name];
+            const childDependency = options.depth > options._args.direct ? {} : json.dependencies[name];
             const dependencyId = `${childDependency.name}@${childDependency.version}`;
 
             if (data[dependencyId]) {
@@ -258,6 +258,7 @@ const flatten = function flatten(options) {
                 development: options.development,
                 production: options.production,
                 unknown,
+                depth: options.depth + 1,
             });
         });
     }
@@ -369,7 +370,9 @@ exports.init = function init(args, callback) {
             development: args.development,
             production: args.production,
             unknown: args.unknown,
+            depth: 0,
         });
+
         const colorize = args.color;
         const sorted = {};
         let filtered = {};