Standardized Belize Flag

[sam596]

Belize standardized their flag in 2019. This repo still uses the previous unstandardized version, where the gaps to the top and bottom of the crest are smaller than they should be, and different colours in the crest itself.

Please see: https://en.wikipedia.org/wiki/Flag_of_Belize

New:

Old:

[lipis]

Some problems with SVGO and the flag from Wikipedia.. have to investigate more.. if it doesn't pass eventually it will break..

[p2made]

How are these? They're in my pull request [updated] #1384 .