chore(master): release 8.0.0

[github-actions]

🤖 I have created a release beep boop

8.0.0 (2026-08-21)

⚠ BREAKING CHANGES

• postgrest: throw on multi-row Single() result instead of returning null (#346)
• gotrue: add retry/backoff and injectable HttpClient support (#371)
• supabase: migrate from Newtonsoft.Json to System.Text.Json (#360)
• realtime: migrate from Newtonsoft.Json to System.Text.Json
• postgrest: migrate from Newtonsoft.Json to System.Text.Json
• storage: migrate from Newtonsoft.Json to System.Text.Json (#358)
• gotrue: migrate from Newtonsoft.Json to System.Text.Json (#357)
• functions: migrate from Newtonsoft.Json to System.Text.Json (#356)
• packages now target netstandard2.1 instead of netstandard2.0. .NET Framework consumers (netstandard2.0 is its ceiling) and pre-netstandard2.1 runtimes (Mono <6.4, older Xamarin/Unity) can no longer reference these packages and must move to a netstandard2.1-capable target (.NET Core 3.0+/.NET 5+).
• postgrest: IPostgrestTable.Delete(QueryOptions?, CancellationToken) and its Table implementation now return Task instead of Task. await table.Delete() is unaffected; code that assigns the result to Task or captures the method group must be recompiled/adjusted.

Features

• core: add retry/backoff plumbing for injectable HttpClient support (#367) (eda8d8d)
• functions: add retry/backoff and injectable HttpClient support (#370) (21e198a)
• functions: migrate from Newtonsoft.Json to System.Text.Json (#356) (3f9780d)
• gotrue: add retry/backoff and injectable HttpClient support (#371) (74a72d0)
• gotrue: migrate from Newtonsoft.Json to System.Text.Json (#357) (0d58f45)
• postgrest: add injectable HttpClient support (#376) (f6bfa69)
• postgrest: add opt-in retry option (#375) (07b6bfe)
• postgrest: migrate from Newtonsoft.Json to System.Text.Json (fe5364b)
• realtime: migrate from Newtonsoft.Json to System.Text.Json (c6767dc)
• storage: migrate from Newtonsoft.Json to System.Text.Json (#358) (673970c)
• supabase: migrate from Newtonsoft.Json to System.Text.Json (#360) (1915bf1)

Bug Fixes

• postgrest: return deleted rows from parameterless Delete (#342) (a7ef38c), closes #334
• postgrest: throw on multi-row Single() result instead of returning null (#346) (52985c2)

Build System

• retarget packages to netstandard2.1 (#344) (41ac485)

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