build(deps): update fire requirement in /requirements

Updates the requirements on [fire](https://github.com/google/python-fire) to permit the latest version.
- [Release notes](https://github.com/google/python-fire/releases)
- [Commits](google/python-fire@v0.6.0...v0.7.0)

---
updated-dependencies:
- dependency-name: fire
  dependency-type: direct:production
...

Signed-off-by: dependabot[bot] <[email protected]>

requirements/_tests.txt

@@ -13,7 +13,7 @@ phmdoctest ==1.4.0
 
 psutil ==6.*
 pyGithub >2.0.0, <2.5.0
-fire ==0.6.*
+fire ==0.7.*
 
 cloudpickle >1.3, <=3.0.0
 scikit-learn ==1.2.*; python_version < "3.9"