Error in columns.lua with Pandoc 2.5

[Benncs]

While testing with README.md and make, pandoc throws some errors like :

Error running filter columns.lua:
columns.lua:71: attempt to call a nil value (method 'insert')
stack traceback:
        columns.lua:71: in function <columns.lua:53>
        (...tail calls...)

It seems to be due to an import error with pandoc.List

[jdutant]

Thanks. Actually the pandoc.List insert method was only introduced in 2.9. We could make the filter backwards compatible by using Lua's native table.insert method. For the time being I've just added a requirement of pandoc >= 2.9.