Fixes to Bokeh BoxWhisker

[hoxbro]

Fixes #6166

import holoviews as hv
import numpy as np

hv.extension("bokeh")

x = np.random.randn(1000)
hv.BoxWhisker(x, vdims="Value")

Fixes #5431

import holoviews as hv
import pandas as pd
hv.extension("bokeh")
df = pd.DataFrame(
    {
        "data": [1, 2, 4, 5, 2, 3, 3, 2, 20, 34],
        "data 2": [1, 2, 4, 5, 2, 3, 3, 2, 20, 34],
        "data[": [1, 2, 4, 5, 2, 3, 3, 2, 20, 34],
        "x": [1, 1, 1, 1, 1, 1, 1, 1, 1, 1],
    }
)

(
    hv.BoxWhisker(df, "x", "data", label="data")
    + hv.BoxWhisker(df, "x", "data 2", label="data 2")
    + hv.BoxWhisker(df, "x", "data[", label="data[")
)

[codecov-commenter]

Codecov Report

Attention: Patch coverage is 75.00000% with 1 line in your changes missing coverage. Please review.

Project coverage is 88.68%. Comparing base (342d81c) to head (b0fbfd2).
Report is 126 commits behind head on main.

Files with missing lines	Patch %	Lines
holoviews/plotting/bokeh/stats.py	75.00%	1 Missing ⚠️

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #6169   +/-   ##
=======================================
  Coverage   88.68%   88.68%           
=======================================
  Files         316      316           
  Lines       66072    66073    +1     
=======================================
+ Hits        58598    58599    +1     
  Misses       7474     7474           

Flag	Coverage Δ
ui-tests	23.79% <25.00%> (+<0.01%)	⬆️

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