Add lsp_signature plugin

roles/neovim/files/config/nvim/lua/plugins/lspconfig.lua

@@ -11,6 +11,7 @@ end
 local null_ls = require("null-ls")
 local lspconfig = require("lspconfig")
 local lsp_status = require('lsp-status')
+require('lsp_signature').setup()
 
 lsp_status.register_progress()
 

roles/neovim/files/config/nvim/lua/plugins/packer.lua

@@ -64,6 +64,9 @@ return require('packer').startup({function()
         config = [[require('plugins.nvim-tree')]],
         requires = 'kyazdani42/nvim-web-devicons'
     }
+    use {
+        'ray-x/lsp_signature.nvim',
+    }
     use 'mhinz/vim-startify'
 
     use {