feat: add at3d to namespace

Author: kgryte

lib/node_modules/@stdlib/array/base/lib/index.js

@@ -126,6 +126,15 @@ setReadOnly( ns, 'assert', require( '@stdlib/array/base/assert' ) );
 */
 setReadOnly( ns, 'at2d', require( '@stdlib/array/base/at2d' ) );
 
+/**
+* @name at3d
+* @memberof ns
+* @readonly
+* @type {Function}
+* @see {@link module:@stdlib/array/base/at3d}
+*/
+setReadOnly( ns, 'at3d', require( '@stdlib/array/base/at3d' ) );
+
 /**
 * @name bifurcateEntries
 * @memberof ns