v0.0.13: Merge pull request #9 from estermer/es/underline

UNDERLINE

v0.0.12: Add a newline in the span tag?

I hope this doesn't bite us in the butt, buttttt... there is a line length
limit and this is really the best place IMO to put the newline because otherwise
it could get converted to a space and be in a bad spot...

v0.0.11: Join with newlines instead of nothing

Because, yes, line length matters :grimacing:

v0.0.10: Merge pull request #8 from digitalonboarding/mf/fix-lists-outlook

Fixes UL and OL in outlook for

v0.0.9

Merge pull request #7 from estermer/es/handle-h4-to-h6

v0.0.8

Merge pull request #6 from digitalonboarding/jc/warnings