Resolve not found slevomat sniffs

Author: brianvarskonst

.github/workflows/ci.yml

@@ -30,7 +30,7 @@ jobs:
                 restore-keys: |
                     ${{ runner.os }}-composer-
             - name: run composer
-              run: composer update --prefer-lowest --prefer-dist --no-interaction --no-progress -W
+              run: composer update --no-interaction --no-progress -W
             - run: xmllint --noout --schema vendor/squizlabs/php_codesniffer/phpcs.xsd Brianvarskonst/ruleset.xml
             - run: xmllint --noout --schema vendor/squizlabs/php_codesniffer/phpcs.xsd phpcs.Brianvarskonst.xml
             - run: xmllint --noout --schema vendor/squizlabs/php_codesniffer/phpcs.xsd phpcs.xml.dist

composer.json

@@ -28,7 +28,7 @@
         "dealerdirect/phpcodesniffer-composer-installer": "^1.0",
         "escapestudios/symfony2-coding-standard": "^3.10.0",
         "phpcsstandards/phpcsutils": "^1.0",
-        "slevomat/coding-standard": "^8",
+        "slevomat/coding-standard": "^8.15.0",
         "squizlabs/php_codesniffer": "^3.8"
     },
     "require-dev": {