v1.0.7

• added 'roman' variant; converts both integers and strings to unicode roman numerals.
• new combinings: enclose-circle, enclose-backslash, enclose-square, enclose-diamond, enclose-screen, enclose-keycap
• new combinings: halo-grave, halo-breve
• new combinings: space, space-en, space-em, space-zero, space-thin, space-hair, space-cjk, space-figure, space-ogham