1.14 support inventory getname method

[CoolLord22]

Describe the bug Seems to contain a lot of code that was deprecated and is now removed, must transfer each of these old methods to a new one?

To Reproduce N/a

Screenshots https://pastebin.com/vt1n6m1s

Desktop (please complete the following information):

• Server Version [Spigot 1.14.2]
• Plugin Version [3.2.7 1.13]