refactor: rename main.js to polyfill.js

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Author: impawstarlight

lib/node_modules/@stdlib/number/uint32/base/mul/lib/index.js

@@ -32,7 +32,7 @@
 
 // MODULES //
 
-var main = require( './main.js' );
+var main = require( './polyfill.js' );
 
 
 // EXPORTS //