fix: update return type

---
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: na
  - 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: passed
  - task: lint_typescript_tests
    status: passed
  - task: lint_license_headers
    status: passed
---

Author: kgryte

lib/node_modules/@stdlib/blas/ext/base/ndarray/zsum/docs/types/index.d.ts

@@ -21,6 +21,7 @@
 /// <reference types="@stdlib/types"/>
 
 import { complex128ndarray } from '@stdlib/types/ndarray';
+import { Complex128 } from '@stdlib/types/complex';
 
 /**
 * Computes the sum of all elements in a one-dimensional double-precision complex floating-point ndarray.
@@ -38,7 +39,7 @@ import { complex128ndarray } from '@stdlib/types/ndarray';
 * var v = zsum( [ x ] );
 * // returns <Complex128>[ 5.0, 5.0 ]
 */
-declare function zsum( arrays: [ complex128ndarray ] ): number;
+declare function zsum( arrays: [ complex128ndarray ] ): Complex128;
 
 
 // EXPORTS //

lib/node_modules/@stdlib/blas/ext/base/ndarray/zsum/docs/types/test.ts

@@ -24,13 +24,13 @@ import zsum = require( './index' );
 
 // TESTS //
 
-// The function returns a number...
+// The function returns a complex number...
 {
 	const x = zeros( [ 10 ], {
 		'dtype': 'complex128'
 	});
 
-	zsum( [ x ] ); // $ExpectType number
+	zsum( [ x ] ); // $ExpectType Complex128
 }
 
 // The compiler throws an error if the function is provided a first argument which is not an array of ndarrays...