chore(master): release 3.0.0

:robot: I have created a release beep boop

bar: dropbar_symbol_t:cat() returns plain text when no bar is associated (7ae61cc)
general behavior: deprecate opts.general.update_events (415a587)
highlights: add hl-DropBarMenuNormalFloat linking to hl-WinBar (#16) (aeea703)
highlights: use hl-DropBarKind* for text highlights (#18) (36ce8a1)
notify neovim version requirement (#15) (d3ebf22)
sources: lsp: check nil before indexing info.data.client_id (#13) (4c746bc)
sources: path: add opts to change file symbol when modified is set (#14) (6c568de)

autocmds: winbar not updated in time in insert mode (e54c1a6)
bar & highlights: hl-DropBarIconUISeparator not set in winbar (96b3fad)
bar: check nil before calling on_click() in dropbar_t:pick() (e920832)
bar: dropbar_t separator and extends losts metatable if merged with opts (dfa59b6)
convert codepoints from nerdfonts v2 to v3 (03f6e86)
error: not allowed in sandbox (0624308)
general behavior: do not clear the winbar when not enabled (5d7030f)
general behavior: update winbar on BufModifiedSet (06e233a)
highlights: add missing hl-DropBarMenuCurrentContext (5c51448)
lint: unused variable self (5d31a34)
menu: dropbar_menu_entry_t separator losts metatable if merged with opts (bb8a146)
menu: dropbar_menu_entry_t:cat() & :find_first_clickable() indexing (9dc9dd0)
menu: dropbar_menu_t:click_on() wrongly updates clicked_at column number (867c5dd)
menu: should close existing sub-menus on opening sub-menus (#8) (10318d1)
sources: markdown parser children symbols resolution logic (37d34e5)
sources: markdown parser init ['end'].lnum (6d9c78c)

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