VERSION: release 0.3.5

[cyphar]

github.com/cyphar/filepath-securejoin v0.3.5

This release primarily includes a fix for an issue involving two
programs racing to MkdirAll the same directory, which caused a
regression with BuildKit.

- `MkdirAll` will now no longer return an `EEXIST` error if two racing
  processes are creating the same directory. We will still verify that the path
  is a directory, but this will avoid spurious errors when multiple threads or
  programs are trying to `MkdirAll` the same path. opencontainers/runc#4543

Signed-off-by: Aleksa Sarai <[email protected]>