Apply g:taskwiki_suppress_mappings to <cr> mapping

Up until now, g:taskwiki_suppress_mappings could be used to supress the
leader keys, but it did nothing to the <cr> mapping
(task_info_or_vimwiki_follow_link())

ftplugin/vimwiki/taskwiki.vim

@@ -96,16 +96,16 @@ execute "command! -buffer -range TaskWikiChooseTag :<line1>,<line2>"         . g
 " Meta commands
 execute "command! -buffer TaskWikiInspect :" . g:taskwiki_py . "Meta().inspect_viewport()"
 
-" Disable <CR> as VimwikiFollowLink
-if !hasmapto('<Plug>VimwikiFollowLink')
-  nmap <Plug>NoVimwikiFollowLink <Plug>VimwikiFollowLink
-endif
+if !exists('g:taskwiki_suppress_mappings')
+  " Disable <CR> as VimwikiFollowLink
+  if !hasmapto('<Plug>VimwikiFollowLink')
+    nmap <Plug>NoVimwikiFollowLink <Plug>VimwikiFollowLink
+  endif
 
-execute "nnoremap <silent><buffer> <CR> :" . g:taskwiki_py . "Mappings.task_info_or_vimwiki_follow_link()<CR>"
+  execute "nnoremap <silent><buffer> <CR> :" . g:taskwiki_py . "Mappings.task_info_or_vimwiki_follow_link()<CR>"
 
-" Leader-related mappings. Mostly <Leader>t + <first letter of the action>
-if !exists('g:taskwiki_suppress_mappings')
-        if exists('g:taskwiki_maplocalleader')
+  " Leader-related mappings. Mostly <Leader>t + <first letter of the action>
+  if exists('g:taskwiki_maplocalleader')
                 let maplocalleader = g:taskwiki_maplocalleader
         else
                 if exists('g:mapleader')