`summarize_range()` now defaults to `na.rm = FALSE`

Relates to https://github.com/2DegreesInvesting/tiltIndicatorAfter/issues/188

This is the safer and most common default. The exclusion of missing values should be done explicitely by the users of the code (e.g. in tiltIndicatorAfter).

TODO

[x] Link related issue/PR.
[x] Describe the goal of the PR. Avoid details that are clear in the diff.
[x] Mark the PR as draft.
[x] Include a unit test.
[x] Review your own PR in "Files changed".
[x] Ensure the PR branch is updated.
[ ] Ensure the checks pass.
[ ] Change the status from draft to ready.
[ ] Polish the PR title and description.
[ ] Assign a reviewer.

EXCEPTIONS

[ ] Slide here any item that you intentionally choose to not do.

2DegreesInvesting / tiltIndicator

`summarize_range()` now defaults to `na.rm = FALSE` #747