Remove ProtocolLib dependency, update to newest Spigot, fix POM to not shade in everything

[vemacs]

• ProtocolLib is unnecessary for determining a player's client version
• Spigot builds after 0916a add an extra boolean for lighting fix to teleport packets, breaking the constructor, this fixes it
• Old POM literally shaded in all of Spigot, this only shades in Updater and Metrics-lite
• Better 1.8 client support by continuously forcing a resend

[calebbfmv]

10/10 would merge

[harrydevane]

I wouldnt use the NMS you implemented for the protocol version check, but apart from that looks good.

[vemacs]

BarAPI is version dependent anyways, so the NMS doesn't hurt. I do have it implemented with reflection, but given that there won't ever be a new versioned package plus BarAPI is version dependent anyways, it really shouldn't matter.