lint: stricter type checking

lua/oil/adapters/trash/freedesktop.lua

@@ -210,6 +210,7 @@ local function read_trash_info(info_file, cb)
               cb(".trashinfo file points to non-existant file")
             else
               trash_info.stat = trash_stat
+              ---@cast trash_info oil.TrashInfo
               cb(nil, trash_info)
             end
           end)

lua/oil/adapters/trash/windows/powershell-connection.lua

@@ -22,6 +22,7 @@ function PowershellConnection.new(init_command)
 
   self:_init(init_command)
 
+  ---@type oil.PowershellConnection
   return self
 end