Merge pull request #6 from jbracker/master

Replaced tuples with appropriate types
Merge pull request #7 from jbracker/master

Fixed another read error on SVG font files.
bump version to 1.3
add CHANGES.md
require diagrams-lib >= 0.7 && < 0.8
note in CHANGES that diagrams-lib-0.7 is now required [ci skip]
Merge branch 'master' of github.com:diagrams/SVGFonts