feat: add zsum to namespace

---
type: pre_commit_static_analysis_report
description: Results of running static analysis checks when committing changes.
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    status: passed
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---

Author: kgryte

lib/node_modules/@stdlib/blas/ext/base/ndarray/lib/index.js

@@ -90,6 +90,15 @@ setReadOnly( ns, 'scusum', require( '@stdlib/blas/ext/base/ndarray/scusum' ) );
 */
 setReadOnly( ns, 'ssum', require( '@stdlib/blas/ext/base/ndarray/ssum' ) );
 
+/**
+* @name zsum
+* @memberof ns
+* @readonly
+* @type {Function}
+* @see {@link module:@stdlib/blas/ext/base/ndarray/zsum}
+*/
+setReadOnly( ns, 'zsum', require( '@stdlib/blas/ext/base/ndarray/zsum' ) );
+
 
 // EXPORTS //