Transparent mode dosen't work with nvim-tree.lua

[dsolay]

After the last update the transparent mode stopped working on nvim-tree panel. Here is an screenshot

Aditional info:

• gruvbox-baby version: 0.1.7
• nvim-tree.lua last commit: https://github.com/kyazdani42/nvim-tree.lua/commit/d753a1da9a58339f1751db96d37e9b318be91825