refactor: rename internal variables

PR-URL: #12894
Reviewed-by: Athan Reines <kgryte@gmail.com>

Author: Planeshifter

lib/node_modules/@stdlib/stats/base/dists/chisquare/mean/lib/index.js

@@ -35,9 +35,9 @@
 
 // MODULES //
 
-var mean = require( './main.js' );
+var main = require( './main.js' );
 
 
 // EXPORTS //
 
-module.exports = mean;
+module.exports = main;

lib/node_modules/@stdlib/stats/base/dists/chisquare/median/lib/index.js

@@ -35,9 +35,9 @@
 
 // MODULES //
 
-var median = require( './main.js' );
+var main = require( './main.js' );
 
 
 // EXPORTS //
 
-module.exports = median;
+module.exports = main;

lib/node_modules/@stdlib/stats/base/dists/chisquare/mode/lib/index.js

@@ -35,9 +35,9 @@
 
 // MODULES //
 
-var mode = require( './main.js' );
+var main = require( './main.js' );
 
 
 // EXPORTS //
 
-module.exports = mode;
+module.exports = main;