Fix --help message in Read the Docs.

Prepare v0.9.12 release.

Attempt to fix 'Read the Docs' build.

Missing conf.py file from sphinx-quickstart.

See https://docs.readthedocs.io/en/stable/config-file/index.html

Prepare v0.9.11 release.

cargo outdated -d 1

cargo outdated -d 1

Avoid warn(noop_method_call) by removing redundant calls to clone().

Update clap, rayon, and smallvec crates to latest versions.

[clippy] Deal with redundant_allocation and arc_with_non_send_sync.

[rust-mode] Use rust-run-clippy to optimize the code a bit.

Prepare v0.9.10 release.

Remove warning: value assigned to is never read.

Update clap and pest crates to latest versions.