0.28.0

• Parse unsafe attributes in #1020
• Fix local override of enum prefix-with-name by jsgf in #1006
• Add rename-all=prefix in #1021
• ir: add support for UnsafeCell and SyncUnsafeCell by alekitto in #1003
• Implement mangling for arrays in #1022
• Fix: Ignore CARGO_BUILD_TARGET in tests by bryango in #1010
• Newline for each field for constexpr field constants by youknowone in #988
• Fix clippy warnings by youknowone in #1026
• Add aarch64/arm64 to CI by NickeZ in #1036
• Add unstable_ir feature flag that makes the ir pub by heesooy in #1011
• Support generated a symbols file by TheElectronWill in #916