* Update README
Move project status to top of project documentation and add explicit
warnings that this project may introduce breaking changes.
* Add disclaimer to public packages docs
* Use explicit warning in README
Rename MergeItererator to MergeIterator to correct the spelling mistake.
Add comment for exported `EmptySet`.
Fix comments on the exported label `Type`s to conform to Go standards.
* Update label.ArrayValue to store copies of 1D arrays
* Update OTLP transform of array attributes
* Add changes to CHANGELOG
* Add PR number to changes
* Update value function documentation
* Remove redundant checks
* Add Array test for invalid array types
* Add test to ensure return from AsArray is a type
* Clean up iteration