* Implement `Send` for `Shm`
it is safe because we take the ownership of the inner map pointer. Only potential
violation is deref the underlying pointer but that’s already unsafe. Therefore,
the properties of Send still hold within the safe world.
* Bump 1.87
* use std::io::pipe so that they are `Send`
* clippy
* upgrade
* Avoid phantomdata to make ForkserverExecutor !Send
* Missing gates
* Fix nostd
* bump in Dockerfile
* use dtolnay/rust-toolchain@stable instead
* setup latest toolchain on non Linux
* Fix typo
0e9dfd62ee