test: add missing empty line before proxyquire eslint disable rule

Author: rautelaKamal

lib/node_modules/@stdlib/stats/base/dists/chi/kurtosis/test/test.js

@@ -21,6 +21,7 @@
 // MODULES //
 
 var tape = require( 'tape' );
+
 // eslint-disable-next-line node/no-unpublished-require
 var proxyquire = require( 'proxyquire' );
 var isnan = require( '@stdlib/math/base/assert/is-nan' );