Julia parser TODO list

[masatake]

See #2654

• [x] [tagging imported object] (https://github.com/universal-ctags/ctags/pull/2654#discussion_r499113865) work in progress #2727. (done)
• [ ] Refactor the code for parsing functions, short-functions and inner constructors, so parsing the name, arguments and body is done using the same code.
• [ ] Add parsing of struct call
• [ ] tag exported items as reference tags
• [ ] tagging included files.
• [ ] add import X as Y new syntax introduced in Julia 1.6
• [ ] parse const fields in structures, introduced in Julia 1.8
• [ ] Tag all variables, from variable assignments and function arguments.

@getzze is the original author.

[masatake]

@getzze, feel free to edit this dashboard (if you need).