Add parameters to histogram

[willschlitzer]

This wraps additional parameters for histogram.

Preview at https://pygmt-git-parameters-histogram-gmt.vercel.app/api/generated/pygmt.Figure.histogram.html

Continuation of work on #563

Reminders

• Run make format and make check to make sure the code follows the style guide.
• Add tests for new features or tests that would have caught the bug that you're fixing.
• Add new public functions/methods/classes to doc/api/index.rst.
• Write detailed docstrings for all functions/methods.
• If adding new functionality, add an example to docstrings or tutorials.

Slash Commands

You can write slash commands (/command) in the first line of a comment to perform
specific operations. Supported slash commands are:

• /format: automatically format and lint the code
• /test-gmt-dev: run full tests on the latest GMT development version

[weiji14]

Still need to alias -L, -U, -V, -t and add the docstring in for these new parameters. Pro tip: copy them from https://github.com/GenericMappingTools/gmt/blob/master/doc/rst/source/histogram_common.rst_.

[weiji14]

Just one minor comment on how we want to sort the docstrings, otherwise I'm happy with the content 😄

[seisman]

Looks good to me, except a tiny comment.