Synchronous minification

[tomherni]

It would be great if html-minifier-terser could run synchronously. I run a bunch of optimizations, and html-minifier-terser is the only one that is async. Having a synchronous version would sligthly simplify my setup.

This request was raised a few years ago (#78), but closed because Terser was async. However, Terser introduced minify_sync() as a synchronous alternative to minify() in v5.27.0.

[oscxc]

These people have a particular fondness for promise, async, and await. They overlook the fact that synchronous execution in sequence is the default behavior of a program. Asynchronous is designed for I/O operations. This compression is purely CPU-based and does not require asynchronous at all.