Don't test dependencies when installing them
Don't test dependencies when installing them

This should speed up testing of the perl6-examples code on Travis.

perl6/perl6-examples,shlomif/perl6-examples,perl6/perl6-examples,shlomif/perl6-examples,perl6/perl6-examples,shlomif/perl6-examples,perl6/perl6-examples,shlomif/perl6-examples,shlomif/perl6-examples,perl6/perl6-examples