feat: add gjoin to namespace

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---

Author: kgryte

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

@@ -729,6 +729,15 @@ setReadOnly( ns, 'gindexOf', require( '@stdlib/blas/ext/base/gindex-of' ) );
 */
 setReadOnly( ns, 'gindexOfRow', require( '@stdlib/blas/ext/base/gindex-of-row' ) );
 
+/**
+* @name gjoin
+* @memberof ns
+* @readonly
+* @type {Function}
+* @see {@link module:@stdlib/blas/ext/base/gjoin}
+*/
+setReadOnly( ns, 'gjoin', require( '@stdlib/blas/ext/base/gjoin' ) );
+
 /**
 * @name glastIndexOf
 * @memberof ns