Evaluate usage of anyhow crate

[joshuabenuck]

Summary

PR #3 introduced the usage of the anyhow crate. anyhow is targeted at usage by applications and not libraries. See this post for a good overview on why this matters.

Desired Behavior

Our error handling crate should not appear in our public API since the favored error handling crate changes over time (as demonstrated by the failure crate being deprecated).

Possible Solution

We should consider switching to thiserror or a similar error handling crate targeted at libraries instead of applications.