GraphViz requires the dot binary which should come with the graphviz operating system package
this should hopefully fix
! Configure failed for GraphViz-2.24. See /home/travis/.cpanm/work/1553436397.11520/build.log for details.
* test compilation of all scripts and modules passes
* try adding NetSNMP::default_store
* try adding NetSNMP::default_store
* travis test all branches
* make Configuration.pm safe for tests
* remove dep
* try adding net-snmp
* dist: xenial
* try building Net-SNMP locally
* no need for Try::Tiny
* allow test to pass for DPP:p
* better testing setup for session cookies
* yay! working compile tests for ALL!