Document that rehype-preset-minify does not work in browser

[iBobik]

It is good to be clear that plugin does not run in broser environment.

ERROR in ./node_modules/uglify-js/tools/node.js 1:9-22
Module not found: Error: Can't resolve 'fs' in 'node_modules/uglify-js/tools'
 @ ./node_modules/rehype-minify-javascript-script/index.js 11:0-30 32:22-35
 @ ./node_modules/rehype-preset-minify/index.js 6:0-74 51:2-30
``

[wooorm]

should work fine probably depends on how you configure your bundler!