Bump pandas from 2.0.3 to 2.1.0

Bumps [pandas](https://github.com/pandas-dev/pandas) from 2.0.3 to 2.1.0.
- [Release notes](https://github.com/pandas-dev/pandas/releases)
- [Commits](pandas-dev/pandas@v2.0.3...v2.1.0)

---
updated-dependencies:
- dependency-name: pandas
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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

Author: dependabot[bot]

pyproject.toml

@@ -61,7 +61,7 @@ tests = [
     "matplotlib==3.7.2",
     "scipy==1.10.1; python_version < '3.9'", # to support python 3.8
     "scipy==1.11.2; python_version > '3.8'",
-    "pandas==2.0.3",
+    "pandas==2.1.0",
     "pyiges[full]==0.3.1",
     "pytest==7.4.0",
     "pytest-cov==4.1.0",
@@ -82,7 +82,7 @@ doc = [
     "jupyterlab>=3.2.8",
     "matplotlib==3.7.2",
     "numpydoc==1.5.0",
-    "pandas==2.0.3",
+    "pandas==2.1.0",
     "plotly==5.16.1",
     "pyiges[full]==0.3.1",
     "pypandoc==1.11",