docs: show lib size diff in readme

Author: ghiscoding

README.md

@@ -12,7 +12,7 @@
 
 Copy files easily via JavaScript or the CLI and cross-platform usage using [cli-nano](https://www.npmjs.com/package/cli-nano) dependency for the CLI.
 
-The library is very similar to the [copyfiles](https://www.npmjs.com/package/copyfiles) package, at least from the outside; however it is quite different internally. It uses native NodeJS as much as possible and so as a lot less dependencies (just 2 instead of 7), which makes this package a lot smaller compared to the original `copyfiles` project (a fifth of its size). The options are nearly the same (except for `--soft`, which is not implemented), there's also some new options that were added in this project (mainly the rename and dry-run features, see below).
+The library is very similar to the [copyfiles](https://www.npmjs.com/package/copyfiles) package, at least from the outside; however it is quite different internally. It uses native NodeJS as much as possible and so as a lot less dependencies (just 2 instead of 7), which makes this package a lot smaller compared to the original `copyfiles` project (1.8kB instead of 27.6kB gzip). The options are nearly the same (except for `--soft`, which is not implemented), there's also some new options that were added in this project (mainly the rename and dry-run features, see below).
 
 > **Note**: there is 1 noticeable difference with `copyfiles` package, all the CLI options must be provided as suffix and after the source/target directories command (the original `copyfiles` project has them as prefix).<br>
 > This mean calling: `copyfiles source target [options]` instead of `copyfiles [options] source target`