v2.1.0

What's Changed

• add diagnostics engine by @MattSScott in #34
• [QoL] tidy interface definitions + make methods private by @MattSScott in #33
• Added divide by 0 protection to diagnostics engine by @mika111 in #36
• Update Docs: ReadMe and User Manual by @MattSScott in #35

Full Changelog: v2.0.0...v2.1.0