feat: add nanmidrangeBy, nanminBy, nanminabs to namespace

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---

Author: kgryte

lib/node_modules/@stdlib/stats/lib/index.js

@@ -414,6 +414,15 @@ setReadOnly( ns, 'nanmeanpn', require( '@stdlib/stats/nanmeanpn' ) );
 */
 setReadOnly( ns, 'nanmeanwd', require( '@stdlib/stats/nanmeanwd' ) );
 
+/**
+* @name nanmidrangeBy
+* @memberof ns
+* @readonly
+* @type {Function}
+* @see {@link module:@stdlib/stats/nanmidrange-by}
+*/
+setReadOnly( ns, 'nanmidrangeBy', require( '@stdlib/stats/nanmidrange-by' ) );
+
 /**
 * @name nanmin
 * @memberof ns
@@ -423,6 +432,24 @@ setReadOnly( ns, 'nanmeanwd', require( '@stdlib/stats/nanmeanwd' ) );
 */
 setReadOnly( ns, 'nanmin', require( '@stdlib/stats/nanmin' ) );
 
+/**
+* @name nanminBy
+* @memberof ns
+* @readonly
+* @type {Function}
+* @see {@link module:@stdlib/stats/nanmin-by}
+*/
+setReadOnly( ns, 'nanminBy', require( '@stdlib/stats/nanmin-by' ) );
+
+/**
+* @name nanminabs
+* @memberof ns
+* @readonly
+* @type {Function}
+* @see {@link module:@stdlib/stats/nanminabs}
+*/
+setReadOnly( ns, 'nanminabs', require( '@stdlib/stats/nanminabs' ) );
+
 /**
 * @name padjust
 * @memberof ns