Release v0.8.0 Nextcloud 26 & 27 support, Drop PHP8.0

What's Changed

• fix for sending multiple headers with the same value by @ylebre in #117
• Allow running in bash on mac by @michielbdejong in #133
• Check cors on openid configuration by @michielbdejong in #134
• remove apache limits conf by @michielbdejong in #136
• Fixes for legacy solid apps (poddit launcher in solid-nextcloud) by @ylebre in #140
• Update to support up to Nextcloud 27 by @ylebre in #142

Full Changelog: v0.7.2...v0.8.0