Implement equality on DimensionValue

[freemansoft]

DimensionValues are equal if their values are equal

Comparing doubles can be bad in some languages because of precision but precision errors results in less equality so I didnt' worry about it.

[codecov[bot]]

Codecov Report

All modified and coverable lines are covered by tests :white_check_mark:

Project coverage is 98.48%. Comparing base (b20e952) to head (6af0604).

Additional details and impacted files

```diff @@ Coverage Diff @@ ## main #23 +/- ## ========================================== + Coverage 98.46% 98.48% +0.01% ========================================== Files 31 31 Lines 847 856 +9 ========================================== + Hits 834 843 +9 Misses 13 13 ```

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[frederikstonge]

@freemansoft the owner of the repository doesn't seem really active. Should we start our own package?

[mark-nicepants]

I can add you as a member to this repo if you want :-) Dont have alot of time currently to pick it up

[frederikstonge]

I can add you as a member to this repo if you want :-) Dont have alot of time currently to pick it up

If you could add @freemansoft, he's the one who contributes the most!

[mark-nicepants]

Added both :-D

[mark-nicepants]

I can also add you guys to the pub.dev package later on. For now just ping me when you need a new version published and ill pull and run the script :-) All help is really appreciated 💯