remove bufferline version constraint for compat with newer nvim

init.lua

@@ -136,7 +136,7 @@ packer.startup(function(use)
     end
   }
   use {
-    'akinsho/bufferline.nvim', tag = "v3.*",
+    'akinsho/bufferline.nvim',
     config = function()
       require("bufferline").setup()
     end,
@@ -188,6 +188,10 @@ require('lspconfig')['rust_analyzer'].setup{
       ["rust-analyzer"] = {}
     }
 }
+require('lspconfig')['jdtls'].setup{
+    on_attach = on_attach,
+    flags = lsp_flags,
+}
 require'lspconfig'.lua_ls.setup {
   settings = {
     Lua = {