Bump the major group with 3 updates (#1145)

Updates the requirements on [pytest](https://github.com/pytest-dev/pytest), [pandas](https://github.com/pandas-dev/pandas) and [matplotlib](https://github.com/matplotlib/matplotlib) to permit the latest version.

Updates `pytest` from 7.2.2 to 8.1.1
- [Release notes](https://github.com/pytest-dev/pytest/releases)
- [Changelog](https://github.com/pytest-dev/pytest/blob/main/CHANGELOG.rst)
- [Commits](https://github.com/pytest-dev/pytest/compare/7.2.2...8.1.1)

Updates `pandas` to 2.2.1
- [Release notes](https://github.com/pandas-dev/pandas/releases)
- [Commits](https://github.com/pandas-dev/pandas/compare/v2.2.0...v2.2.1)

Updates `matplotlib` to 3.8.3
- [Release notes](https://github.com/matplotlib/matplotlib/releases)
- [Commits](https://github.com/matplotlib/matplotlib/compare/v3.8.2...v3.8.3

)

---
updated-dependencies:
- dependency-name: pytest
  dependency-type: direct:production
  update-type: version-update:semver-major
  dependency-group: major
- dependency-name: pandas
  dependency-type: direct:development
  dependency-group: major
- dependency-name: matplotlib
  dependency-type: direct:development
  dependency-group: major
...
Signed-off-by: dependabot[bot] <support@github.com>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

requirements-ci.txt

 # Requirements used for GitHub actions
-pytest==7.2.2
+pytest==8.1.1
 einops==0.6.0
 lion-pytorch==0.0.6
 scipy==1.10.1; python_version < "3.9"

requirements-dev.txt

 # Requirements used for local development
 setuptools>=63
-pytest~=7.2.2
+pytest~=8.1.1
 einops~=0.6.0
 wheel~=0.40.0
 lion-pytorch~=0.0.6
 scipy~=1.11.4
-pandas~=2.2.0
-matplotlib~=3.8.2
+pandas~=2.2.1
+matplotlib~=3.8.3