Release v0.2.5 — tracks sibidharan/zealphp v0.2.5 (security patch)

Bundled ZealPHP refreshed to v0.2.5, which patches an HTTP response-
splitting vulnerability in the uopz header() override. New scaffolds
via composer create-project pick up the fix automatically.

All v0.2.x releases prior to v0.2.5 are affected. Existing projects
should run: composer update sibidharan/zealphp