Update altair requirement from <5 to <6

[dependabot]

Updates the requirements on altair to permit the latest version.

Release notes

Sourced from altair's releases.

Version 5.5.0

Release 5.5.0

The Vega-Altair team is pleased to announce the release of version 5.5.0. This version introduces several exciting new features and enhancements including a revamped theme system, a new renderer optimized for screen readers, and numerous type system updates that improve auto-completion and make it easier to integrate Altair into larger typed programs.

This release adds Python 3.13 and removes Python 3.8 support. It also includes a variety of documentation improvements and a range of important bug fixes.

Thanks to our maintainers (@​binste, @​dangotbanned, @​joelostblom, @​mattijn, and @​jonmmease), returning contributors (@​MarcoGorelli, @​daylinmorgan, and @​dsmedia), and first time contributors (@​jpn--, @​davidgroves, and @​apoorvkh) for these improvements.

What's Changed

Deprecation

alt.themes

This release deprecates the alt.themes ThemeRegistry object and replaces it with an improved theme API in the new alt.theme module. See the updated Chart Themes documentation for more information.

[!NOTE] Usage of the legacy alt.themes registry will be supported until version 6, but will now display a warning on first use.

• Refactor alt.themes -> alt.theme by @​dangotbanned in #3618
• Adds @alt.theme.register decorator by @​dangotbanned in #3526
• Adds ThemeConfig (TypedDict) by @​dangotbanned in #3536

Example of registering a custom theme

import altair as alt
import pandas as pd
data = pd.DataFrame({'x': [5, 3, 6, 7, 2],
'y': ['A', 'B', 'C', 'D', 'E']})
@​alt.theme.register("my_little_theme", enable=True)
def custom_theme():
return alt.theme.ThemeConfig(
config={
"bar":{"color":"black"}
}
)
chart = alt.Chart(data).mark_bar().encode(
x='x',
y='y',
)
chart  # enable default using alt.theme.enable("default")

Example of instant feedback while you define a theme config through Pylance in VSCode

Enhancements

... (truncated)

Commits

• b2ff8ce chore: Release 5.5.0 (#3699)
• b6481d2 chore: bump narwhals to v1.14.2 (#3697)
• 6c79fa9 include PR title type in pull_request_template (#3698)
• 17aeb2c fix: Add missing top-level "config" keys in vega-themes.json (#3696)
• c6920cc simplify deprecation message (#3695)
• c41e29e chore: Use pass_through instead of strict in narwhals.from_native, use ...
• 936c0af fix ci warning (#3691)
• 1f44896 refactor: distinct Olli renderer template (#3689)
• 9b224f6 bump narwhals to v1.13.1 (#3690)
• a0c091e feat: VegaFusion 2 will support narwhals (#3682)
• Additional commits viewable in compare view

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[github-actions]

📦 Wheel files have been deployed to Cloudflare Pages:

• streamlit_webrtc-0.63.4.dev3+g0ef8fcc.d20250731-py3-none-any.whl

  pip install https://3fb8441e.streamlit-webrtc-hosting.pages.dev/streamlit_webrtc-0.63.4.dev3+g0ef8fcc.d20250731-py3-none-any.whl

• streamlit_webrtc-0.63.4.dev3+g0ef8fcc.d20250731.tar.gz

  pip install https://3fb8441e.streamlit-webrtc-hosting.pages.dev/streamlit_webrtc-0.63.4.dev3+g0ef8fcc.d20250731.tar.gz