Update generated travis.yml to address CI failures

There's a new version of the Dist::Zilla::Plugin::TravisYML dzil plugin
- we're hoping it speeds up our CI runs and gets them passing
again. Most of the CI runs were actually failing while trying to install
Dist::Zilla and its dependencies, and not even making it to S::R::D's
tests, which was frustrating.

.travis.yml

@@ -1,18 +1,29 @@
 language: perl
 perl:
-   - 5.19
-   - 5.18
-   - 5.16
-   - 5.14
-   - 5.12
-   - 5.10
+   - 'blead'
+   - '5.20'
+   - '5.18'
+   - '5.16'
+   - '5.14'
+   - '5.12'
+   - '5.10'
+   - '5.8'
+matrix:
+   allow_failures:
+      - perl: 'blead'
+      - perl: '5.8'
+   fast_finish: true
 before_install:
-   - export AUTOMATED_TESTING=1 HARNESS_OPTIONS=j10:c HARNESS_TIMER=1
+   - export AUTOMATED_TESTING=1 NONINTERACTIVE_TESTING=1 HARNESS_OPTIONS=j10:c HARNESS_TIMER=1
+   - git clone git://github.com/haarg/perl-travis-helper
+   - source perl-travis-helper/init
+   - build-perl
+   - perl -V
    - git config --global user.name "TravisCI"
    - git config --global user.email $HOSTNAME":not-for-mail@travis-ci.org"
 install:
    - cpanm --quiet --notest --skip-satisfied Dist::Zilla
-   - "dzil authordeps | grep -vP '[^\\w:]' | xargs -n 5 -P 10 cpanm --quiet --notest --skip-satisfied"
-   - "dzil listdeps   | grep -vP '[^\\w:]' | cpanm --verbose --skip-satisfied"
+   - "dzil authordeps          --missing | grep -vP '[^\\w:]' | xargs -n 5 -P 10 cpanm --quiet --notest"
+   - "dzil listdeps   --author --missing | grep -vP '[^\\w:]' | cpanm --verbose"
 script:
    - dzil smoke --release --author