`cargo hack` ignores my MSRV compatible `Cargo.lock`, preventing me from testing my MSRV

[epage]

UPDATE(taiki-e):

• The situation here has been improved, and the latest cargo-hack overwrites the existing Cargo.lock only when it is necessary to work around old cargo bugs (https://github.com/taiki-e/cargo-hack/pull/242). If you want to ensure that the existing Cargo.lock is respected in all cases, please use --locked.

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While I got cargo-hack working in Cargo, it seems Cargo's dependencies align on MSRV. I tried adopting it in a project where MSRVs is misaligned with dependencies and was surprised that my curated `Cargo.lock was blown away to solve #105.