Format dates according to settings

[rdeago]

This PR fixes the three instances in which DateTime.ToLongDateString() is called instead of DateTimeCultureExtensions.ToLongDateString(IExecutionContext), thus ignoring any DateTimeDisplayCulture setting.

I didn't even open an issue for this since it is a rather trivial bug with a rather trivial fix.

[rdeago]

Actually, never mind. This PR is identical to #19, which has been gathering dust for six months now.

[daveaglick]

which has been gathering dust for six months now

😬 guess I better get some PRs merged! Time flies when you don't have a lot of it to spare...

[rdeago]

@daveaglick sorry if I sounded rude, my fault for not checking open PRs.

I was so proud of myself for understanding the problem and coming up with the solution while knowing next to zilch about both Statiq and Razor... Oh well, interesting experience anyway. I spent some time in the flow like it rarely happens these days.

Time flies when you don't have a lot of it to spare...

Man, can I relate! 😄 🤦‍♂️

Anyway, more PRs soon to come:

• a serious update of all dependencies, as Update js and css libraries consumed by theme layout file #16 is eleven months old (done, currently testing);
• a better look for blockquotes (done);
• finally I want to give a shot at giscus integration.