bug fixes

[kujaku11]

• update how edi.measurement objects are compared.

[codecov-commenter]

Codecov Report

Attention: 7 lines in your changes are missing coverage. Please review.

Comparison is base (c5ffe4c) 83.98% compared to head (02d27e9) 83.99%. Report is 3 commits behind head on main.

Files	Patch %	Lines
mt_metadata/base/metadata.py	66.66%	3 Missing :warning:
mt_metadata/transfer_functions/io/edi/edi.py	50.00%	3 Missing :warning:
...er_functions/io/edi/metadata/define_measurement.py	83.33%	1 Missing :warning:

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Additional details and impacted files

```diff @@ Coverage Diff @@ ## main #180 +/- ## ========================================== + Coverage 83.98% 83.99% +0.01% ========================================== Files 269 269 Lines 20098 20130 +32 ========================================== + Hits 16880 16909 +29 - Misses 3218 3221 +3 ``` | [Flag](https://app.codecov.io/gh/kujaku11/mt_metadata/pull/180/flags?src=pr&el=flags&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=JP) | Coverage Δ | | |---|---|---| | [tests](https://app.codecov.io/gh/kujaku11/mt_metadata/pull/180/flags?src=pr&el=flag&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=JP) | `83.99% <86.79%> (+0.01%)` | :arrow_up: | Flags with carried forward coverage won't be shown. [Click here](https://docs.codecov.io/docs/carryforward-flags?utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=JP#carryforward-flags-in-the-pull-request-comment) to find out more.

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