Pin pandas

[mxaviersmp]

Types of changes

• [ ] Bug fix (non-breaking change which fixes an issue)
• [ ] New feature (non-breaking change which adds functionality)
• [ ] Breaking change (fix or feature that would cause existing functionality to change)
• [ ] I have read the CONTRIBUTING document.
• [ ] My code follows the code style of this project (see .code-style.md).
• [ ] All new and existing tests passed (see .testing.md).
• [ ] I have added tests to cover my changes.
• [ ] My change requires a change to the documentation.
• [ ] I have updated the documentation accordingly (see .documentation.md).

Description

• What is the current behavior? (You can also link to an open issue here)

• What is the new behavior (if this is a feature change)?