feat: add mediansorted, midrange, midrangeBy to namespace

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---

Author: kgryte

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

@@ -288,6 +288,33 @@ setReadOnly( ns, 'meanpw', require( '@stdlib/stats/meanpw' ) );
 */
 setReadOnly( ns, 'meanwd', require( '@stdlib/stats/meanwd' ) );
 
+/**
+* @name mediansorted
+* @memberof ns
+* @readonly
+* @type {Function}
+* @see {@link module:@stdlib/stats/mediansorted}
+*/
+setReadOnly( ns, 'mediansorted', require( '@stdlib/stats/mediansorted' ) );
+
+/**
+* @name midrange
+* @memberof ns
+* @readonly
+* @type {Function}
+* @see {@link module:@stdlib/stats/midrange}
+*/
+setReadOnly( ns, 'midrange', require( '@stdlib/stats/midrange' ) );
+
+/**
+* @name midrangeBy
+* @memberof ns
+* @readonly
+* @type {Function}
+* @see {@link module:@stdlib/stats/midrange-by}
+*/
+setReadOnly( ns, 'midrangeBy', require( '@stdlib/stats/midrange-by' ) );
+
 /**
 * @name min
 * @memberof ns