Types.renderBS should recognize line breaks

[coreyoconnor]

From Simon Michael: "I expected renderBS to convert a multiline string into an Image of height > 1."

[jtdaugherty]

I notice that

• renderBS is now utf8Bytestring
• string and text also lack the above described behavior

For instance, to render a multiline string I essentially always do

vertCat $ string <$> lines s

Do you think this change is worth making? Given my experience with vty-ui and brick I'd say it would be useful to make the string-rendering functions handle newlines in a reasonable way, but it could also be a breaking change.

[jtdaugherty]

(Also, given the lack of other requests for this behavior, it could also be reasonable to just close this as unimportant.)