Testing for default normalisation

[tennlee]

The test coverage is not yet great, but this PR contains a useful change in that the case of the Normalisation class has been corrected. There would be some value in merging this now and raising a new PR for further expanding test coverage, but it is also reasonable to wait while more coverage is added to this PR. It also contains an actual bugfix where part of the code is calling a lower-case "drop" when an upper-case "Drop" is required. Putting up the PR now so that if anyone runs into these issues, they can request an early merge.

[coveralls]

Pull Request Test Coverage Report for Build 14083275211

Details

• 54 of 55 (98.18%) changed or added relevant lines in 5 files are covered.
• No unchanged relevant lines lost coverage.
• Overall coverage increased (+0.6%) to 54.417%

---

Changes Missing Coverage	Covered Lines	Changed/Added Lines	%
packages/data/src/pyearthtools/data/transforms/transform.py	1	2	50.0%

Totals
Change from base Build 14058365217:	0.6%
Covered Lines:	7238
Relevant Lines:	12832

---

💛 - Coveralls

[tennlee]

Coverage lifted from around 20% to 44%, but this is a useful increment and I suggest it could be merged here. Remaining coverage will require more complex test data construction and/or more complex mocking to achieve.

[tennlee]

Merging this to get the bug resolved and improve coverage. Please feel free to raise new issues should there be further work required.

[jennan]

Hi @tennlee, would it be ok to run black to make the pre-commit hook happy :-)? I notice it failed on this one.

[tennlee]

I have just re-run the black and end-of-line formatters, things should be happy again. I will try to help with the isort issues if I can.