Remove Window Dependency

Currently the package can only be installed in another project that is web based, however, there are many projects that just need the types that are not web based.

Possible solutions:

• Remove/update maths.round, uses d3 and needs window
• Split this repo into two: for web stuff, for just types
• Two packages in same repo

changed milestone to %NSHM Hazard Tool - Sprint 5

added To Do label

assigned to @bclayton

mentioned in issue nshmp-haz#537 (closed)

added In Progress label and removed To Do label

leaflet and ploty also issue

mentioned in merge request !172 (merged)

mentioned in commit 4c2e0289

closed with merge request !172 (merged)

removed In Progress label