test(loaders): Add test for load_gps_solutions #126

[madhavmk]

• Add unittest coverage for loaders.py load_gps_solutions().
• Issue https://github.com/uw-ssec/offshore-geodesy/issues/126

[codecov[bot]]

Codecov Report

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

Comparison is base (2b265b4) 38.39% compared to head (605d60e) 39.12%.

Additional details and impacted files

```diff @@ Coverage Diff @@ ## main #168 +/- ## ========================================== + Coverage 38.39% 39.12% +0.72% ========================================== Files 16 16 Lines 823 823 ========================================== + Hits 316 322 +6 + Misses 507 501 -6 ``` [see 1 file with indirect coverage changes](https://app.codecov.io/gh/uw-ssec/offshore-geodesy/pull/168/indirect-changes?src=pr&el=tree-more&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=uw-ssec)

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[madhavmk]

Thanks for the PR suggestions @lsetiawan . I have resolved them, and updated the PR.