Entries in widthCache never removed #305
Description
Over time when logging table after table I've noticed a memory build up that likely is from the items in the widthCache map not having a expiration.
Showing top 10 nodes out of 40
flat flat% sum% cum cum%
97.50MB 63.78% 63.78% 97.50MB 63.78% ...
23.39MB 15.30% 79.08% 23.39MB 15.30% github.com/olekukonko/tablewriter/pkg/twwidth.Width
13.45MB 8.80% 87.87% 13.95MB 9.12% ...
5.01MB 3.28% 91.15% 5.01MB 3.28% ...
A workaround is to toggle the SetEastAsian occasionally.