* Automated using https://github.com/myii/ssf-formula/pull/207
* Use `bionic` for Travis (also no longer need to use `pip3`)
* Add `without-ipv6` suite, to avoid errors with `ip6tables` such as:
```
[ERROR ] stdout: ERROR: initcaps
[Errno 2] ip6tables v1.8.4 (legacy): can't initialize ip6tables table `filter': Table does not exist (do you need to insmod?)
Perhaps ip6tables or your kernel needs to be upgraded.
```
* Semi-automated using `ssf-formula` (v0.5.0)
* Fix errors shown below:
```bash
ufw-formula$ $(grep "\- yamllint" .travis.yml | sed -e "s:^\s\+-\s\(.*\):\1:")
pillar.example
1:1 warning missing document start "---" (document-start)
3:12 warning truthy value should be one of [false, true] (truthy)
7:11 warning truthy value should be one of [false, true] (truthy)
12:22 warning truthy value should be one of [false, true] (truthy)
64:13 warning truthy value should be one of [false, true] (truthy)
69:13 warning truthy value should be one of [false, true] (truthy)
77:13 warning truthy value should be one of [false, true] (truthy)
84:14 warning truthy value should be one of [false, true] (truthy)
101:16 warning truthy value should be one of [false, true] (truthy)
106:14 warning truthy value should be one of [false, true] (truthy)
110:13 warning truthy value should be one of [false, true] (truthy)
test/salt/pillar/default.sls
1:1 warning missing document start "---" (document-start)
2:12 warning truthy value should be one of [false, true] (truthy)
9:14 warning truthy value should be one of [false, true] (truthy)
12:13 warning truthy value should be one of [false, true] (truthy)
15:13 warning truthy value should be one of [false, true] (truthy)
19:13 warning truthy value should be one of [false, true] (truthy)
25:14 warning truthy value should be one of [false, true] (truthy)
29:13 warning truthy value should be one of [false, true] (truthy)
```
Imran Iqbal
Dafydd Jones
Nicolas Rodriguez
Alexandre Anriot