Prune unused deps + general dependency cleanup

[actioninja]

I'm submitting a

• bug fix (?)
• feature
• documentation addition

All dependency entries were sorted.

eval, fs_extra, and all dev dependencies were dropped from the app crate as they were unused. eval, fs_extra, openssl, paw, structopt, andtracing-subscriber were dropped from regular dependencies of the lib crate, and tempdir, assert_cmd, predicates, and assert_fs were removed from dev-dependencies.

In one test, usage of tempdir was replaced with the tempdir functionality of tempfile as tempdir is deprecated.

Every dependency was bumped to the latest possible minor version. Major versions would likely require a more hand-done audit, but minor versions are supposed to be back-compatible and safe to update aggressively. Tests still run fine after doing this, so I'm erring on that semver was properly followed for dependencies.

The only potentially contentious part here is that I dropped the patch version pin on each dep, preferring instead to only specify major.minor. The whole dep tree is already pinned via Cargo.lock, and I prefer to let the most recent patch be more aggressively consumed. Due to the way cargo resolves dependencies, Minor version is much less safe of a guarantee due to the way that Minor doesn't need to be forward-compatible by design.

If there's a particular reason why every dep is pinned down to patch version, I'll go through and pin each to the current latest patch for the minor version. Patch version changes should always be cross compatible both forward and back, the exception here would be non-semver compliant crates.

[codecov-commenter]

Codecov Report

Patch coverage: 100.00% and no project coverage change.

Comparison is base (a92abf2) 44.96% compared to head (001d500) 44.96%.

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Additional details and impacted files

@@           Coverage Diff           @@
##             main     #324   +/-   ##
=======================================
  Coverage   44.96%   44.96%           
=======================================
  Files          82       82           
  Lines        2942     2942           
=======================================
  Hits         1323     1323           
  Misses       1619     1619           

Impacted Files	Coverage Δ
lib/src/atoms/file/copy.rs	81.35% <100.00%> (ø)

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[icepuma]

Na, there is no particular reason they should be pinned. Major.Minor should be enough.