Update fire requirement from <0.6.0,>=0.4.0 to >=0.4.0,<0.7.0

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@v0.4.0...v0.6.0)

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

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

requirements.txt

@@ -1,5 +1,5 @@
 dataclasses>=0.6,<1.0.0; python_version < "3.7"
-fire>=0.4.0,<0.6.0
+fire>=0.4.0,<0.7.0
 numpy>=1.19.5,<2
 pandas>=1.1.5,<3
 pyarrow>=6.0.1,<16