release v3.3.0

release v3.3.0

* Fix http\Client::requeue() not updating response callback
* Backport bug fixes and features from v4:
  * Fixed configure reliably finding the right libcurl features available
  * Fixed cookie handling with libcurl 7.77+ and consistently across all
    supported libcurl versions (follow-up to gh issue #116)
  * Fixed cookies failing with libcurl >= 7.77 (see gh issue #116)
  * Fixed tests using $_ENV instead of getenv() to find executables in PATH (see gh issue #113)
  * Fixed configure on systems which do not provide icu-config
  * Fixed gh-issue #89: Cookie handling cannot be disabled since v3.2.1
  * Added http\Env::reset(): resets internal HTTP request cache (see gh issue #90)
  * Added request options:
    * http\Client\Curl::$abstract_unix_socket
    * http\Client\Curl::$altsvc
    * http\Client\Curl::$altsvc_ctrl
    * http\Client\Curl::$aws_sigv4
    * http\Client\Curl::$doh_url
    * http\Client\Curl::$dns_shuffle_addresses
    * http\Client\Curl::$haproxy_protocol
    * http\Client\Curl::$hsts
    * http\Client\Curl::$hsts_ctrl
    * http\Client\Curl::$http09_allowed
    * http\Client\Curl::$maxage_conn
    * http\Client\Curl::$pinned_publickey
    * http\Client\Curl::$proxy_ssl
    * http\Client\Curl::$socks5_auth
    * http\Client\Curl::$tcp_fastopen
    * http\Client\Curl::$tls13_ciphers
    * http\Client\Curl::$xoauth2_bearer
  * Added request option constants:
    * http\Client\Curl\AUTH_AWS_SIGV4
    * http\Client\Curl\AUTH_BEARER
    * http\Client\Curl\AUTH_NONE
    * http\Client\Curl\HTTP_VERSION_2_PRIOR_KNOWLEDGE
    * http\Client\Curl\HTTP_VERSION_3
    * http\Client\Curl\SSL_VERSION_MAX_*
    * http\Client\Curl\SSL_VERSION_TLSv1_3
  * Added library version constants:
    * http\Client\Curl\Versions\BROTLI
    * http\Client\Curl\Versions\CAINFO
    * http\Client\Curl\Versions\CAPATH
    * http\Client\Curl\Versions\HYPER
    * http\Client\Curl\Versions\ICONV
    * http\Client\Curl\Versions\NGHTTP2
    * http\Client\Curl\Versions\QUIC
    * http\Client\Curl\Versions\ZSTD