fix: insert false to give word instead of emoji

[UtkarshKunwar]

Fixes #7.

Not sure if it's the right way to go about this to achieve this functionality in terms of optimality but for me it achieves the desired functionality with the following minimal config,

cmp.setup({
    ... -- other generic config options
    sources = {
        { name = "nvim_lsp" },
        { name = "nvim_lua" },
        { name = "luasnip" },
        { name = "buffer" },
        { name = "path" },
        { name = "calc" },
        { name = "emoji", option = { insert = false } },
        { name = "git" },
    },
    ... -- other generic config options
})