bench: fix assertions

---
type: pre_commit_static_analysis_report
description: Results of running static analysis checks when committing changes.
report:
  - task: lint_filenames
    status: passed
  - task: lint_editorconfig
    status: passed
  - task: lint_markdown
    status: na
  - task: lint_package_json
    status: na
  - task: lint_repl_help
    status: na
  - task: lint_javascript_src
    status: na
  - task: lint_javascript_cli
    status: na
  - task: lint_javascript_examples
    status: na
  - task: lint_javascript_tests
    status: na
  - task: lint_javascript_benchmarks
    status: passed
  - task: lint_python
    status: na
  - task: lint_r
    status: na
  - task: lint_c_src
    status: na
  - task: lint_c_examples
    status: na
  - task: lint_c_benchmarks
    status: na
  - task: lint_c_tests_fixtures
    status: na
  - task: lint_shell
    status: na
  - task: lint_typescript_declarations
    status: na
  - task: lint_typescript_tests
    status: na
  - task: lint_license_headers
    status: passed
---

Author: kgryte

lib/node_modules/@stdlib/array/base/zip2objects/benchmark/benchmark.js

@@ -21,7 +21,7 @@
 // MODULES //
 
 var bench = require( '@stdlib/bench' );
-var isPlainObject = require( '@stdlib/assert/is-plain-object' );
+var isArray = require( '@stdlib/assert/is-array' );
 var zeroTo = require( '@stdlib/array/base/zero-to' );
 var pkg = require( './../package.json' ).name;
 var zip2objects = require( './../lib' );
@@ -42,12 +42,12 @@ bench( pkg+':len=100', function benchmark( b ) {
 	for ( i = 0; i < b.iterations; i++ ) {
 		v = zip2objects( [ x, x ], labels );
 		if ( typeof v !== 'object' ) {
-			b.fail( 'should return an object' );
+			b.fail( 'should return an array' );
 		}
 	}
 	b.toc();
-	if ( !isPlainObject( v ) ) {
-		b.fail( 'should return an object' );
+	if ( !isArray( v ) ) {
+		b.fail( 'should return an array' );
 	}
 	b.pass( 'benchmark finished' );
 	b.end();