Draft: Write MSRV in derive-deftly-macros Cargo.toml too

This will help (at least) lib.rs print the right information.

assigned to @Diziet

enabled an automatic merge when the pipeline for 89c7f1ed succeeds

CI failure is cargo giving a spurious error, https://github.com/rust-lang/cargo/issues/14147

aborted the automatic merge because source branch was updated

added 2 commits

• b6cd93ee - Use old syntax in build.rs
• f8389928 - Write MSRV in derive-deftly-macros Cargo.toml too

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enabled an automatic merge when the pipeline for f8389928 succeeds

canceled the automatic merge

added 2 commits

• 83818e16 - Use old syntax in build.rs
• bc9a38c0 - Write MSRV in derive-deftly-macros Cargo.toml too

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marked this merge request as draft

Rebased this onto 0.13 as !434 (merged) to fix #103 (closed).

added 1 commit

• a93ab4fe - Write MSRV in derive-deftly-macros Cargo.toml too

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closed