Add support for downloading jar from external source

[Osiris-Team]

Currently this only supports downloading jars hosted on spigot directly.
Most of the jars are hosted externally and most of these links actually point directly to the jar.
That's why I think this feature would be very beneficial and worth implementing.

[InventivetalentDev]

Downloads are a huge pain as it is, so I'm not gonna expand to external sources, sorry.

[Osiris-Team]

Downloads are a huge pain as it is, so I'm not gonna expand to external sources, sorry.

F

[Osiris-Team]

@InventivetalentDev How about I help you with that? Would it change your mind?

[Osiris-Team]

@InventivetalentDev Huh. Did you change your mind? ahah: https://api.spiget.org/v2/resources/1997/download
ProtocolLib gets downloaded even though its external.

[InventivetalentDev]

@Osiris-Team I didn't, sorry. They might've changed it to be external along the way.

[Osiris-Team]

@InventivetalentDev Ok but that's not changing the fact, that it's working, haha!
Hope it stays this way lol