Bump myclabs/deep-copy from 1.7.0 to 1.9.5

Bumps [myclabs/deep-copy](https://github.com/myclabs/DeepCopy) from 1.7.0 to 1.9.5.
- [Release notes](https://github.com/myclabs/DeepCopy/releases)
- [Commits](https://github.com/myclabs/DeepCopy/compare/1.7.0...1.9.5)

Signed-off-by: dependabot[bot] <support@github.com>

composer.json

@@ -58,7 +58,7 @@
         "symfony/yaml": "3.4.2",
         "symfony/finder": "3.4.8",
         "symfony/stopwatch" : "4.4.9",
-        "myclabs/deep-copy": "1.7.0",
+        "myclabs/deep-copy": "1.9.5",
         "phpunit/phpunit" : "^7",
         "phpunit/phpunit-selenium": "^7",
         "roave/security-advisories": "dev-master"