PHP polyfills
CURLStringFile
polyfill by @Ayesh in https://github.com/symfony/polyfill/pull/334
IntlDateFormatter::format()
by @mbabker in https://github.com/symfony/polyfill/pull/430
#[\Override]
attribute by @IonBazan in https://github.com/symfony/polyfill/pull/434
odbc_connection_string_*()
polyfills to CHANGELOG.md and README by @derrabus in https://github.com/symfony/polyfill/pull/438
Date/Time
extension by @Ayesh in https://github.com/symfony/polyfill/pull/440
Full Changelog: https://github.com/symfony/polyfill/compare/v1.27.0...v1.28.0