Install failure

[jayvdb]

rustup run stable install commentective fails with the following. Building from the repo works, so a release is needed. #41 looks like it will be a release, so hopefully that can be merged soon.

The latest tag here is https://github.com/simeg/commentective/releases/tag/v0.3.0 , while https://crates.io/crates/commentective is v0.8.1

error: cannot find macro `crate_authors` in this scope
  --> /home/jayvdb/.cargo/registry/src/github.com-1ecc6299db9ec823/commentective-0.8.1/src/bin/commentective.rs:58:17
   |
58 |         .author(crate_authors!())
   |                 ^^^^^^^^^^^^^

error: cannot find macro `crate_version` in this scope
  --> /home/jayvdb/.cargo/registry/src/github.com-1ecc6299db9ec823/commentective-0.8.1/src/bin/commentective.rs:59:18
   |
59 |         .version(crate_version!())
   |                  ^^^^^^^^^^^^^

error[E0599]: no method named `about` found for struct `Arg` in the current scope
  --> /home/jayvdb/.cargo/registry/src/github.com-1ecc6299db9ec823/commentective-0.8.1/src/bin/commentective.rs:26:10
   |
26 |         .about("Formats output with \"file.ext:line\" without colors. Only outputs files with comments.");
   |          ^^^^^ method not found in `Arg<'_>`
...