97: fix tests for upcoming ggplot2

[danielinteractive]

closes #97

[github-actions]

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[danielinteractive]

I have read the CLA Document and I hereby sign the CLA

[github-actions]

Code Coverage Summary

Filename               Stmts    Miss  Cover    Missing
-------------------  -------  ------  -------  ---------
R/geom_km_ticks.R         10       0  100.00%
R/geom_km.R               10       0  100.00%
R/stat_km_compute.R       26       0  100.00%
R/stat_km_ticks.R         10       0  100.00%
R/stat_km.R               10       0  100.00%
TOTAL                     66       0  100.00%

Diff against main

Filename      Stmts    Miss  Cover
----------  -------  ------  --------
TOTAL             0       0  +100.00%

Results for commit: 9ede752

Minimum allowed coverage is 80%

♻️ This comment has been updated with latest results

[github-actions]

Unit Tests Summary

 1 files  10 suites   2s ⏱️
18 tests 14 ✅ 4 💤 0 ❌
55 runs  48 ✅ 7 💤 0 ❌

Results for commit 9ede752.

♻️ This comment has been updated with latest results.

[danielinteractive]

Hi @m7pr , could you please review? I don't have admin rights for this repo so need an approval. Thanks!

[danielinteractive]

Hi @pawelru , could you please review and approve? I did not get a response from @m7pr