style: align module import order in ndarray/to-rot180 with sibling packages

Move `@stdlib/string/format` after the `@stdlib/ndarray/base/*` import to
match the ordering used in every sibling `ndarray/to-*` package, including
the structurally identical `to-rot90`.

Author: claude

lib/node_modules/@stdlib/ndarray/to-rot180/lib/main.js

@@ -24,8 +24,8 @@ var isIntegerArray = require( '@stdlib/assert/is-integer-array' ).primitives;
 var isPlainObject = require( '@stdlib/assert/is-plain-object' );
 var isndarrayLike = require( '@stdlib/assert/is-ndarray-like' );
 var hasOwnProp = require( '@stdlib/assert/has-own-property' );
-var format = require( '@stdlib/string/format' );
 var base = require( '@stdlib/ndarray/base/to-rot180' );
+var format = require( '@stdlib/string/format' );
 
 
 // MAIN //