travis: Lock asciidoctor to 1.5.4
authorBjørn Erik Pedersen <bjorn.erik.pedersen@gmail.com>
Wed, 5 Oct 2016 12:11:56 +0000 (14:11 +0200)
committerBjørn Erik Pedersen <bjorn.erik.pedersen@gmail.com>
Wed, 5 Oct 2016 12:11:56 +0000 (14:11 +0200)
commitf37f57a8147d137d8aa82c01e11f1ce7861562c0
tree9797f77edca1139e10a0e53c1bf3880b03d790a2
parentb3a113b73a2137b7497640e43ba3cd1f4e3ae048
travis: Lock asciidoctor to 1.5.4

1.5.5 (the newly released) seems to break.
.travis.yml