fix: update deprecated health function for nvim 0.11+

[Ebriopes]

Fix for the deprecated function health for NeoVIM 0.11+
Based in the issue #161 (comment)

Replaced functions:

• health#report_start
• health#report_info
• health#report_warn
• health#report_error
• health#report_ok

Before	After

[Ebriopes]

I have a suggestion to avoid retro-compatibility issues with this:

Suggested change

	let s:health = {}
	if has("nvim-0.10.0")
	let s:health = {
	\ 'start': {msg -> luaeval('vim.health.start(_A)', msg)},
	\ 'info': {msg -> luaeval('vim.health.info(_A)', msg)},
	\ 'warn': {msg -> luaeval('vim.health.warn(_A)', msg)},
	\ 'error': {msg -> luaeval('vim.health.error(_A)', msg)},
	\ 'ok': {msg -> luaeval('vim.health.ok(_A)', msg)}
	\ }
	else
	let s:health = {
	\ 'start': function('health#report_start'),
	\ 'info': function('health#report_info'),
	\ 'warn': function('health#report_warn'),
	\ 'error': function('health#report_error'),
	\ 'ok': function('health#report_ok')
	\ }
	endif

And we can continue updating our new dictionary to use the correct health functionality
Example in comment: #167 (comment)