Compatible Span._.value extension

[percevalw]

Description

Fixes #220

Checklist

• [x] If this PR is a bug fix, the bug is documented in the test suite.
• [x] Changes were documented in the changelog (pending section).
• [x] If necessary, changes were made to the documentation (eg new pipeline).

[codecov[bot]]

Codecov Report

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

Comparison is base (d354057) 96.49% compared to head (ff947da) 96.51%. Report is 2 commits behind head on master.

Additional details and impacted files

```diff @@ Coverage Diff @@ ## master #228 +/- ## ========================================== + Coverage 96.49% 96.51% +0.01% ========================================== Files 254 254 Lines 8361 8372 +11 ========================================== + Hits 8068 8080 +12 + Misses 293 292 -1 ```

:umbrella: View full report in Codecov by Sentry.
:loudspeaker: Have feedback on the report? Share it here.