feat/backup

[karchx]

JARs backup at the time of running the inspection on the jar files, either a scan or with the --rewrite command, for example

log4scanner -b -w ./jar/testdata

the copy of the JARs is saved in

backup/*.jar

• '*' any filename

This may solve the issues:

• Rewrite should back up the original jar(s) by default #13

Any improvement will be a pleasure to carry it out

[karchx]

@ericchiang
Done, Any improvement I would be very grateful if you mention it and so I work on it, but I think it's pretty good.

[ericchiang]

Thanks! mostly just a comment about creating a new directory vs not

[karchx]

Done

[ericchiang]

lgtm! two nits

[ericchiang]

also, can you please squash your commits?

[karchx]

@ericchiang I was squashing commits and the PR seemed to be closed

[ericchiang]

It looks like you've got some conflicts? If you need to open a new PR feel free, or I can pull in the changes myself.

[karchx]

If it's not too much of a problem, I'll leave it to you.