Reporter changes:

• (#299) Adjust heuristic for line-based versus byte-based diffing
• (#306) Use value.TypeString in PathStep.String

Code cleanup changes:

• (#297) Use reflect.Value.IsZero
• (#304) Format with Go 1.19 formatter
• (#300 )Fix typo in Result documentation
• (#302) Pre-declare global type variables
• (#309) Run tests on Go 1.19