Update dependencies

[amy-keibler]

This doesn't fix the vulnerability in log4rs, but it's still probably a good idea to keep up with other dependencies so we don't fall too far behind.

• Alphabetize the dependency list.
• Fix some minor changes that stemmed from the dependency version updates.

[amy-keibler]

This fails with the same log4rs error as the main branch, so it should be safe to merge. I've built & tested locally.

Inverse Dependency graph
traitobject 0.1.0 (registry+https://github.com/rust-lang/crates.io-index)
└── unsafe-any 0.4.2 (registry+https://github.com/rust-lang/crates.io-index)
    └── typemap 0.3.3 (registry+https://github.com/rust-lang/crates.io-index)
        └── log4rs 1.0.0 (registry+https://github.com/rust-lang/crates.io-index)
            └── cargo-pants 0.4.2 (path+file:///home/circleci/project)

Audited Dependencies: 161
Vulnerable Dependencies: 1