Release v0.2.0

Release v0.2.0
Refactored for encapsulation within a struct and unit-tests.

https://echozulu.hashnode.dev/rust-hex-converter-console-example-part-2

Release v0.1.0

Demonstrates basic desired command line functionality.

See https://echozulu.hashnode.dev/rust-hex-converter-console-example-part-1