fix: replace tbl_flatten to flatten():totable()

[pablobfonseca]

Deprecation warnings in v0.10 and v11 nightlies

vim.tbl_flatten is deprecated, use vim.iter(…):flatten():totable() instead. :help deprecated
Feature will be removed in Nvim 0.12

[rcarriga]

Thanks for the PR!

[busla]

This PR broke something.

My config (from nvim-kickstart)

    dapui.setup {
      -- Set icons to characters that are more likely to work in every terminal.
      --    Feel free to remove or use ones that you like more! :)
      --    Don't feel like these are good choices.
      icons = { expanded = '▾', collapsed = '▸', current_frame = '*' },
      controls = {
        icons = {
          pause = '⏸',
          play = '▶',
          step_into = '⏎',
          step_over = '⏭',
          step_out = '⏮',
          step_back = 'b',
          run_last = '▶▶',
          terminate = '⏹',
          disconnect = '⏏',
        },
      },
    }

[pablobfonseca]

Hi @busla which version of neovim are you using? I'll try to reproduce it

[busla]

v0.9.5

[phdah]

FYI: This was a breaking change from NVIM v0.9 , vim.iter() was implemented here which was referenced in the NVIM v.10.0 release. Not sure how you maintain this specific plugin in regards to breaking changes, but maybe a good idé would be to have a check for the version, until the NVIM 0.12 and depreciation of vim. tbl_flatten?

[busla]

yeah, let me upgrade to v10 😄