Bump format to 3.0 in the luarocks-3 branch.
Bump format to 3.0 in the luarocks-3 branch.

keplerproject/luarocks,tarantool/luarocks,tarantool/luarocks,keplerproject/luarocks,luarocks/luarocks,keplerproject/luarocks,luarocks/luarocks,keplerproject/luarocks,tarantool/luarocks,luarocks/luarocks