Merge pull request #24 from nhsevidence/new-glyphs

Add new glyphs

src/stylesheets/helpers/_helpers-glyphs.scss

@@ -10,16 +10,20 @@
 /// @prop {String} bullet [2022] Bullet (•)
 /// @prop {String} copyright [00a9] Copyright symbol (©)
 /// @prop {String} greater-than [003e] Greater than symbol (>)
+/// @prop {String} hyphen-minus [002d] Hyphen minus (-)
 /// @prop {String} left-double-quotation-mark [201C] Left double quotation mark (“)
 /// @prop {String} less-than [003c] Less than symbol (<)
+/// @prop {String} plus [002b] Plus sign (+)
 /// @prop {String} punc-space [02008] Punctuation space (small, width of a comma)
 /// @since 0.1.0
 $nice-glyphs: (
   bullet: '2022',
   copyright: '00a9',
   greater-than: '003e',
+  hyphen-minus: '002d',
   left-double-quotation-mark: '201C',
   less-than: '003c',
+  plus: '002b',
   punc-space: '02008'
   // Add more entity codes here as and when they're needed
 ) !default;