feat: semver-release

implement [suggested changes](#35 (comment)),
to improve consistency across formulas

.travis.yml

@@ -26,9 +26,25 @@ services:
 #       Ref: https://github.com/saltstack-formulas/template-formula/issues/121
 env:
   matrix:
-    - INSTANCE: default-debian-9
-    - INSTANCE: default-centos-7
-    - INSTANCE: default-fedora-29
+    - INSTANCE: default-debian-9-2019-2-py3
+    # - INSTANCE: default-ubuntu-1804-2019-2-py3
+    - INSTANCE: default-centos-7-2019-2-py3
+    - INSTANCE: default-fedora-29-2019-2-py3
+    # - INSTANCE: default-opensuse-leap-15-2019-2-py3
+    # - INSTANCE: default-debian-9-2018-3-py2
+    # - INSTANCE: default-ubuntu-1604-2018-3-py2
+    # - INSTANCE: default-centos-7-2018-3-py2
+    # - INSTANCE: default-fedora-29-2018-3-py2
+    # TODO: Use this when fixed instead of `opensuse-leap-42`
+    # Ref: https://github.com/netmanagers/salt-image-builder/issues/2
+    # - INSTANCE: default-opensuse-leap-15-2018-3-py2
+    # - INSTANCE: default-opensuse-leap-42-2018-3-py2
+    # - INSTANCE: default-debian-8-2017-7-py2
+    # - INSTANCE: default-ubuntu-1604-2017-7-py2
+    # TODO: Enable after improving the formula to work with other than `systemd`
+    # - INSTANCE: default-centos-6-2017-7-py2
+    # - INSTANCE: default-fedora-28-2017-7-py2
+    # - INSTANCE: default-opensuse-leap-42-2017-7-py2
 
 script:
   - bundle exec kitchen verify ${INSTANCE}

kitchen.yml

@@ -11,19 +11,19 @@ driver:
 # Make sure the platforms listed below match up with
 # the `env.matrix` instances defined in `.travis.yml`
 platforms:
-  - name: debian-9
+  - name: debian-9-2019-2-py3
     driver:
       image: netmanagers/salt-2019.2-py3:debian-9
-  - name: ubuntu-1804
+  - name: ubuntu-1804-2019-2-py3
     driver:
       image: netmanagers/salt-2019.2-py3:ubuntu-18.04
-  - name: centos-7
+  - name: centos-7-2019-2-py3
     driver:
       image: netmanagers/salt-2019.2-py3:centos-7
-  - name: fedora-29
+  - name: fedora-29-2019-2-py3
     driver:
       image: netmanagers/salt-2019.2-py3:fedora-29
-  - name: opensuse-leap-15
+  - name: opensuse-leap-15-2019-2-py3
     driver:
       image: netmanagers/salt-2019.2-py3:opensuse-leap-15
       run_command: /usr/lib/systemd/systemd