Require newer erlydtl (at least f74b94f8) in dependencies

[savuori]

The newest rebar tries to compile dtl-templates but fails with "ERROR: Compiling template templates/axiom_error_404.dtl failed". This is caused by a failing match in erlydtl's compile which is fixed from f74b94f8 onward.

[tsujigiri]

Thanks for reporting this! I upgraded erlydtl. Locally the tests pass, but Travis fails. I will have to investigate. Hopefully I can get to it during the next few days.

ping rebar/rebar#46