plugin: configure vimtex with tectonic

Co-Authored-by: iGor milhit <igor.milhit@unige.ch>

init.vim

@@ -217,13 +217,12 @@ let g:isort_command='isort'
 
 " #########################################
 " #########################################
-let g:vimtex_compiler_latexmk = { 
-        \ 'executable' : 'latexmk',
+" Vimtex configuration
+let g:vimtex_compiler_method = 'tectonic'
+let g:vimtex_compiler_tectonic = { 
         \ 'options' : [ 
-        \   '-xelatex',
-        \   '-file-line-error',
-        \   '-synctex=1',
-        \   '-interaction=nonstopmode',
+        \   '--keep-logs',
+        \   '-synctex',
         \ ],
         \}