vim-patch:8.2.0915: search() cannot skip over matches like searchpair() can

Problem:    Search() cannot skip over matches like searchpair() can.
Solution:   Add an optional "skip" argument. (Christian Brabandt, closes vim/vim#861)
adc17a5f9d

Enable skip arg usage in autoload/freebasic.vim

evalarg_T doesn't really matter because it's deleted in v8.2.0918 (and
reincarnated for Vim9 script in v8.2.1047), but I found out too late :P Anyway:

- Port evalarg_T into eval.h and use const char * and Callback fields
- Use EVALARG_INIT to initialize
- Return bool over OK/FAIL from evalarg functions
- Remove check from evalarg_clean as callback_free ignores None callbacks anyway
- Move eva_buf field into evalarg_get as a local (not sure what reason it has
  being in the struct)

N/A patches for version.c:

vim-patch:8.2.4355: unnecessary call to check_colorcolumn()

Problem:    Unnecessary call to check_colorcolumn().
Solution:   Remove the call. (Sean Dewar, closes vim/vim#9748)
0f7ff851cb

runtime/autoload/freebasic.vim

@@ -23,8 +23,7 @@ function! freebasic#GetDialect() abort
 
   let save_cursor = getcurpos()
   call cursor(1, 1)
-  " let lnum = search(pat, 'n', '', '', skip) " 'skip' needs 8.2.0915
-  let lnum = search(pat, 'n', '', '')
+  let lnum = search(pat, 'n', '', '', skip)
   call setpos('.', save_cursor)
 
   if lnum