feat: add dtypeStrings to namespace

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---

Author: kgryte

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

@@ -373,6 +373,15 @@ setReadOnly( ns, 'dtypeResolveStr', require( '@stdlib/ndarray/base/dtype-resolve
 */
 setReadOnly( ns, 'dtypeStr2Enum', require( '@stdlib/ndarray/base/dtype-str2enum' ) );
 
+/**
+* @name dtypeStrings
+* @memberof ns
+* @readonly
+* @type {Function}
+* @see {@link module:@stdlib/ndarray/base/dtype-strings}
+*/
+setReadOnly( ns, 'dtypeStrings', require( '@stdlib/ndarray/base/dtype-strings' ) );
+
 /**
 * @name dtype2c
 * @memberof ns