detect-kerning 
Calculate kerning pairs for a font.
```js
const kerning = require('detect-kerning')
let pairs = kerning('Roboto')
/
{
'A”': -10,'W.': -5,'P,': -3,...pairs = kerning(family|familyList, pairs|range|options?)
Detect kerning pairs for the font family or stack of families and return their kerning in 1000 units/em. Optionally pass specific kerning pairs to check, or a unicode range, by default all printable ASCII character pairs are detected from the [32, 126] range. Alternatively, an options object can define:
options.pairs- specific pairs to check;
options.range- unicode range to detect pairs from;
options.fontSize- base font size to use for check. Can affect performance, by default 16.
options.threshold- font size (em) ratio to detect kerning, by default 0.05. Values below that number can bloat kerning table size.
Related
- css-font for parsing font-family from css font string.
