Release v0.21.0 · DeterminateSystems/nix-installer

This release has a few important-to-note changes:

It removes support for i686-linux (see https://determinate.systems/posts/nix-installer-i686-linux/)
It bumps the installed-by-default Nix version to 2.24.3
It is the first release with the --determinate flag. For more details, see: https://determinate.systems/nix

What's Changed

Drop a ton of target_os based cfg's to allow more tests and clippies to be caught cross-platform by @grahamc in #1058
Add troubleshooting doc by @lucperkins in #1037
Distribute Determinate Nix by @grahamc in #1003
--determinate fixups by @grahamc in #1068
Update cache pubkeys by @grahamc in #1076
In the plan json, specify the action name for every action by @noamraph in #1061
flesh out some further deployment integration by @grahamc in #1081
Test --determinate in CI, and fix integration issues by @grahamc in #1084
Update deps by @cole-h in #1090
Remove support for i686-linux by @cole-h in #1093
fixup: socket enablement on older systemd versions by @cole-h in #1094
Properly fixup socket enablement on older systemd versions by @cole-h in #1095
Upgrade Nix to 2.24.3 by @cole-h in #1100
setup_default_profile: don't substitute by @cole-h in #1101
fixup: add Service= to determinate-nixd.socket by @cole-h in #1102
Add --determinate container and VM tests by @cole-h in #1103
Release v0.21.0 by @cole-h in #1091

Full Changelog: v0.20.2...v0.21.0