Add option to forward query parameters from source to destination

[julienarcin]

Referencing discussion #93

[ash-jc-allen]

Hey @julienarcin! Thanks for the PR, I'll take a look at this later today 😄

[ash-jc-allen]

I've looked through this PR and made some slight changes to it to simplify it a bit. Instead of the params overriding each other, they'll just be appended to the end of the URL instead.

Example:
URL: https://short.com/short/ABC123
Destination URL: https://destination.com?param1=hello&param2=goodbye

Request to: https://short.com/short/ABC123?param1=abc will redirect to: https://destination.com?param1=hello&param2=goodbye&param1=abc.

Huge thanks for the PR, I think this'll come in handy for quite a few people! 😄

[julienarcin]

Thanks 😉

[julienarcin]

Maybe you should update the readme.md file to reflect the change ?

[ash-jc-allen]

@julienarcin Don't worry, I'm just working on that now and making a few changes at once :)

[julienarcin]

OK 👍