rust-hg-core: upgrade dependencies This upgrades all dependencies to their latest version, except `clap` and `zstd` whose latest versions do not support our minimum supported Rust version 1.48.0. Same as for `rhg`, it contains security fix for `regex` which does not affect us too much, but doesn't hurt, and the rest of the upgrades are there simply to keep up. Differential Revision: https://phab.mercurial-scm.org/D12358

# See http://EditorConfig.org for the specification

root = true

[*.py]
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indent_style = space
trim_trailing_whitespace = true
end_of_line = lf

[*.{c,h}]
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trim_trailing_whitespace = true
end_of_line = lf

[*.t]
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end_of_line = lf