ci(kitchen+travis): upgrade matrix after `2019.2.2` release [skip ci]

* Automated using https://github.com/myii/ssf-formula/pull/86

.travis.yml

       script:
         # Install and run `salt-lint`
         - pip install --user salt-lint
-        - git ls-files | grep '\.sls$\|\.jinja$\|\.j2$\|\.tmpl$'
+        - git ls-files | grep '\.sls$\|\.jinja$\|\.j2$\|\.tmpl$\|\.tst$'
                        | xargs -I {} salt-lint {}
         # Install and run `yamllint`
         # Need at least `v1.17.0` for the `yaml-files` setting
     # Make sure the instances listed below match up with
     # the `platforms` defined in `kitchen.yml`
     - env: INSTANCE=repositories-debian-10-master-py3
-    # - env: INSTANCE=preferences-debian-10-master-py3
-    # - env: INSTANCE=repositories-ubuntu-1804-develop-py3
-    # - env: INSTANCE=preferences-ubuntu-1804-develop-py3
+    - env: INSTANCE=preferences-debian-10-master-py3
+    # - env: INSTANCE=repositories-ubuntu-1804-master-py3
+    # - env: INSTANCE=preferences-ubuntu-1804-master-py3
     - env: INSTANCE=repositories-debian-9-2019-2-py3
     - env: INSTANCE=preferences-debian-9-2019-2-py3
     - env: INSTANCE=repositories-ubuntu-1804-2019-2-py3

kitchen.yml

 # Make sure the platforms listed below match up with
 # the `env.matrix` instances defined in `.travis.yml`
 platforms:
-  ## SALT `develop` => `master`
+  ## SALT `master`
   - name: debian-10-master-py3
     driver:
       image: netmanagers/salt-master-py3:debian-10
       provision_command:
         - curl -o bootstrap-salt.sh -L https://bootstrap.saltstack.com
         - sh bootstrap-salt.sh -XdPbfrq -x python3 git master
-  - name: ubuntu-1804-develop-py3
+  - name: ubuntu-1804-master-py3
     driver:
-      image: netmanagers/salt-develop-py3:ubuntu-18.04
+      image: netmanagers/salt-master-py3:ubuntu-18.04
       provision_command:
         - curl -o bootstrap-salt.sh -L https://bootstrap.saltstack.com
-        - sh bootstrap-salt.sh -XdPbfrq -x python3 git develop
+        - sh bootstrap-salt.sh -XdPbfrq -x python3 git master
 
   ## SALT `2019.2`
   - name: debian-9-2019-2-py3