Some shell characters like '!' or '$' are not correctly escaped

[jodeka]

Tested on: Manjaro Linux

On our project we have filenames like "!$xyz.png". This is due internal requirements in the "RPG Maker MV" game engine. Normal rsync command on bash does copy them without any issues. But with gulp-rsync and these files, we have errors like the following:

gulp-rsync: rsync: [sender] link_stat "!.png" failed: No such file or directory (2)

all other files are synced without any problems. gulp then finishes with a non zero exit code and these error messages:

gulp-rsync: rsync error: some files/attrs were not transferred (see previous errors) (code 23) at main.c(1326) [sender=v3.2.4]

 Error in plugin "gulp-rsync"
Message:
    Error: rsync exited with code 23
    at ChildProcess.<anonymous> (node_modules/gulp-rsync/rsync.js:121:17)
    at ChildProcess.emit (node:events:527:28)
    at ChildProcess.emit (node:domain:537:15)
    at maybeClose (node:internal/child_process:1092:16)
    at Process.ChildProcess._handle.onexit (node:internal/child_process:302:5)
    at Process.callbackTrampoline (node:internal/async_hooks:130:17)
Details:
    domainEmitter: [object Object]
    domainThrown: false

probably the escapeShellArgs function should be replaced by something like shell-escape

function escapeShellArg(arg) {
  if (!/(["'`\\\(\) ])/.test(arg)) {
    return arg;
  }
  arg = arg.replace(/([\\])/g, '/');
  return '"' + arg.replace(/(["'`\\])/g, '\\$1') + '"';
}