(all) Don't use nvim_{buf,win}_get_option() in code in favor of vim.{bo,wo}.

Details:
- They have been soft deprecated for a long time.

Author: echasnovski

doc/mini-cursorword.txt

@@ -61,7 +61,7 @@ Module-specific disabling:
 >
   _G.cursorword_blocklist = function()
     local curword = vim.fn.expand('<cword>')
-    local filetype = vim.api.nvim_buf_get_option(0, 'filetype')
+    local filetype = vim.bo.filetype
 
     -- Add any disabling global or filetype-specific logic here
     local blocklist = {}

lua/mini/cursorword.lua

@@ -61,7 +61,7 @@
 --- >
 ---   _G.cursorword_blocklist = function()
 ---     local curword = vim.fn.expand('<cword>')
----     local filetype = vim.api.nvim_buf_get_option(0, 'filetype')
+---     local filetype = vim.bo.filetype
 ---
 ---     -- Add any disabling global or filetype-specific logic here
 ---     local blocklist = {}