Unable to control font size of titles for LaTeX tables

[bzkrouse]

Prework

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Description

Font sizes for titles and subtitles set via tab_options() do not translate into the rendered LaTeX.

Reproducible example

exibble |> 
  gt() |> 
  tab_options(
    table.font.size = "10pt",
    heading.title.font.size = "10pt",
    heading.subtitle.font.size = "10pt"
  ) |> 
  tab_header(title = "My title",
             subtitle = "My subtitle") |>
  as_latex() |> 
  cat()

results in the following:

\begin{table}[!t]
\caption*{
{\large My title} \\ 
{\small My subtitle}
} 
\fontsize{10.0pt}{12.0pt}\selectfont
\begin{tabular*}{\linewidth}{@{\extracolsep{\fill}}rlcrrrrll}
\toprule
num & char & fctr & date & time & datetime & currency & row & group \\ 
\midrule\addlinespace[2.5pt]
1.111e-01 & apricot & one & 2015-01-15 & 13:35 & 2018-01-01 02:22 & 49.950 & row\_1 & grp\_a \\ 
2.222e+00 & banana & two & 2015-02-15 & 14:40 & 2018-02-02 14:33 & 17.950 & row\_2 & grp\_a \\ 
3.333e+01 & coconut & three & 2015-03-15 & 15:45 & 2018-03-03 03:44 & 1.390 & row\_3 & grp\_a \\ 
4.444e+02 & durian & four & 2015-04-15 & 16:50 & 2018-04-04 15:55 & 65100.000 & row\_4 & grp\_a \\ 
5.550e+03 & NA & five & 2015-05-15 & 17:55 & 2018-05-05 04:00 & 1325.810 & row\_5 & grp\_b \\ 
NA & fig & six & 2015-06-15 & NA & 2018-06-06 16:11 & 13.255 & row\_6 & grp\_b \\ 
7.770e+05 & grapefruit & seven & NA & 19:10 & 2018-07-07 05:22 & NA & row\_7 & grp\_b \\ 
8.880e+06 & honeydew & eight & 2015-08-15 & 20:20 & NA & 0.440 & row\_8 & grp\_b \\ 
\bottomrule
\end{tabular*}
\end{table}

As you can see, the titles and subtitles are set to "large" and "small" fonts, respectively. It would be great to have control over these font sizes.
Thanks in advance for the consideration!