Panic on crate review

[matthiasbeyer]

• Which version are you using (eg. cargo crev --version): 0.23.1, 0.23.2
• How did you install crev (git?, cargo?, your distribution?): nix
• What OS/platform are you running on: linux, 5.15 kernel

$ RUST_BACKTRACE=1 cargo crev crate review -u filters
thread 'main' panicked at 'assertion failed: !crate_root.starts_with(std::env::current_dir()?)', cargo-crev/src/review.rs:39:5
stack backtrace:
   0: rust_begin_unwind
   1: core::panicking::panic_fmt
   2: core::panicking::panic
   3: cargo_crev::review::create_review_proof
   4: cargo_crev::crate_review::{{closure}}
   5: cargo_crev::shared::handle_goto_mode_command
   6: cargo_crev::crate_review
   7: cargo_crev::run_command
   8: std::panicking::try
   9: cargo_crev::handle_command_result_and_panics
  10: cargo_crev::main
note: Some details are omitted, run with `RUST_BACKTRACE=full` for a verbose backtrace.