feat: add variance, variancech, variancepn, variancetk, and variancewd to namespace

---
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---

Author: kgryte

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

@@ -1422,6 +1422,51 @@ setReadOnly( ns, 'svarianceyc', require( '@stdlib/stats/strided/svarianceyc' ) )
 */
 setReadOnly( ns, 'sztest', require( '@stdlib/stats/strided/sztest' ) );
 
+/**
+* @name variance
+* @memberof ns
+* @readonly
+* @type {Function}
+* @see {@link module:@stdlib/stats/strided/variance}
+*/
+setReadOnly( ns, 'variance', require( '@stdlib/stats/strided/variance' ) );
+
+/**
+* @name variancech
+* @memberof ns
+* @readonly
+* @type {Function}
+* @see {@link module:@stdlib/stats/strided/variancech}
+*/
+setReadOnly( ns, 'variancech', require( '@stdlib/stats/strided/variancech' ) );
+
+/**
+* @name variancepn
+* @memberof ns
+* @readonly
+* @type {Function}
+* @see {@link module:@stdlib/stats/strided/variancepn}
+*/
+setReadOnly( ns, 'variancepn', require( '@stdlib/stats/strided/variancepn' ) );
+
+/**
+* @name variancetk
+* @memberof ns
+* @readonly
+* @type {Function}
+* @see {@link module:@stdlib/stats/strided/variancetk}
+*/
+setReadOnly( ns, 'variancetk', require( '@stdlib/stats/strided/variancetk' ) );
+
+/**
+* @name variancewd
+* @memberof ns
+* @readonly
+* @type {Function}
+* @see {@link module:@stdlib/stats/strided/variancewd}
+*/
+setReadOnly( ns, 'variancewd', require( '@stdlib/stats/strided/variancewd' ) );
+
 /**
 * @name varianceyc
 * @memberof ns