feat: add diagonal and reverseDimensions to namespace

---
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---

Author: kgryte

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

@@ -391,6 +391,15 @@ setReadOnly( ns, 'ndarray', require( '@stdlib/ndarray/base/ctor' ) );
 */
 setReadOnly( ns, 'data', require( '@stdlib/ndarray/base/data-buffer' ) );
 
+/**
+* @name diagonal
+* @memberof ns
+* @readonly
+* @type {Function}
+* @see {@link module:@stdlib/ndarray/base/diagonal}
+*/
+setReadOnly( ns, 'diagonal', require( '@stdlib/ndarray/base/diagonal' ) );
+
 /**
 * @name dtype
 * @memberof ns
@@ -1228,6 +1237,15 @@ setReadOnly( ns, 'reverse', require( '@stdlib/ndarray/base/reverse' ) );
 */
 setReadOnly( ns, 'reverseDimension', require( '@stdlib/ndarray/base/reverse-dimension' ) );
 
+/**
+* @name reverseDimensions
+* @memberof ns
+* @readonly
+* @type {Function}
+* @see {@link module:@stdlib/ndarray/base/reverse-dimensions}
+*/
+setReadOnly( ns, 'reverseDimensions', require( '@stdlib/ndarray/base/reverse-dimensions' ) );
+
 /**
 * @name rot90
 * @memberof ns