Cargo lockfile outdated

[harens]

Commit 293372a
rustc 1.51.0
macOS 11.1 20C69 on x86_64
Xcode 12.4 12D4e

rustc --print cfg

debug_assertions
target_arch="x86_64"
target_endian="little"
target_env=""
target_family="unix"
target_feature="fxsr"
target_feature="sse"
target_feature="sse2"
target_feature="sse3"
target_feature="ssse3"
target_os="macos"
target_pointer_width="64"
target_vendor="apple"
unix

Back in 293372a, the version number was changed to 0.10.1, but I don't think the cargo.lock was updated with it. This resulted in a build error when compiling with MacPorts.

> cargo build --release --frozen
error: the lock file /Users/harensamarasinghe/exa/Cargo.lock needs to be updated but --frozen was passed to prevent this
If you want to try to generate the lock file without accessing the network, use the --offline flag.

The current workaround workaround for this is to remove the --frozen flag (as the MacPorts portfile does here), but obviously it would be nice to fix the issue upstream. Since this should be an easy issue to fix, I'll send a PR to do so shortly.

Thank you for maintaining this project! 😄