ci: update `pre-commit` configuration inc. for pre-commit.ci [skip ci]

* Automated using https://github.com/myii/ssf-formula/pull/450

.gitlab-ci.yml

 # default-debian-9-3003-4-py3: {extends: '.test_instance'}
 # default-ubuntu-2004-3003-4-py3: {extends: '.test_instance'}
 # default-ubuntu-1804-3003-4-py3: {extends: '.test_instance'}
-# default-debian-10-3002-8-py3: {extends: '.test_instance'}
-# default-debian-9-3002-8-py3: {extends: '.test_instance'}
-# default-ubuntu-2004-3002-8-py3: {extends: '.test_instance'}
-# default-ubuntu-1804-3002-8-py3: {extends: '.test_instance'}
 # yamllint enable rule:line-length
 
 ###############################################################################

.pre-commit-config.yaml

 ---
 # See https://pre-commit.com for more information
 # See https://pre-commit.com/hooks.html for more hooks
+ci:
+  autofix_commit_msg: |
+    ci(pre-commit.ci): apply auto fixes from pre-commit.com hooks
+
+    For more information, see https://pre-commit.ci
+  autofix_prs: true
+  autoupdate_branch: ''
+  autoupdate_commit_msg: |
+    ci(pre-commit.ci): perform `pre-commit` autoupdate
+  autoupdate_schedule: quarterly
+  skip: []
+  submodules: false
 default_stages: [commit]
 repos:
   - repo: https://github.com/dafyddj/commitlint-pre-commit-hook
         additional_dependencies: ['@commitlint/config-conventional@8.3.4']
         always_run: true
   - repo: https://github.com/rubocop-hq/rubocop
-    rev: v1.25.1
+    rev: v1.30.1
     hooks:
       - id: rubocop
         name: Check Ruby files with rubocop

.travis.yml

     # - env: INSTANCE=default-debian-9-3003-4-py3
     # - env: INSTANCE=default-ubuntu-2004-3003-4-py3
     # - env: INSTANCE=default-ubuntu-1804-3003-4-py3
-    # - env: INSTANCE=default-debian-10-3002-8-py3
-    # - env: INSTANCE=default-debian-9-3002-8-py3
-    # - env: INSTANCE=default-ubuntu-2004-3002-8-py3
-    # - env: INSTANCE=default-ubuntu-1804-3002-8-py3
 
     ## Define the release stage that runs `semantic-release`
     - stage: 'release'

kitchen.yml

       image: saltimages/salt-3003.4-py3:ubuntu-18.04
       run_command: /lib/systemd/systemd
 
-  ## SALT `3002.8`
-  - name: debian-10-3002-8-py3
-    driver:
-      image: saltimages/salt-3002.8-py3:debian-10
-      run_command: /lib/systemd/systemd
-  - name: debian-9-3002-8-py3
-    driver:
-      image: saltimages/salt-3002.8-py3:debian-9
-      run_command: /lib/systemd/systemd
-  - name: ubuntu-2004-3002-8-py3
-    driver:
-      image: saltimages/salt-3002.8-py3:ubuntu-20.04
-      run_command: /lib/systemd/systemd
-  - name: ubuntu-1804-3002-8-py3
-    driver:
-      image: saltimages/salt-3002.8-py3:ubuntu-18.04
-      run_command: /lib/systemd/systemd
-
 verifier:
   # https://www.inspec.io/
   name: inspec