Allow rybakit/msgpack v0.8

Author: rybakit

Diff for: composer.json

@@ -14,7 +14,7 @@
         "php": "^7.1|^8",
         "composer/semver": "^1.5",
         "composer/package-versions-deprecated": "^1.4",
-        "rybakit/msgpack": "^0.7",
+        "rybakit/msgpack": "^0.7|^0.8",
         "rybakit/phpunit-extras": "^0.2",
         "symfony/expression-language": "^3.3|^4|^5",
         "tarantool/client": "^0.8|^0.9"