* add new icons
- add icon for AT&T
- add icon for T-mobile
- add icon for Sprint
- add icon for Cricket
- add icon for Verizon
- add icon for Boost
- add icon for Framer
- add icon for Sketch
- Update _data/simple-icons.json with new icon data
* remove `<g>` from svg files
- remove `<g>` from svg files to address svglint error
* add apple pay
- Add apple pay
- Update simple-icons.json
* make changes per review
Changes were made based on review 9/9/18.
* fixed AT&T naming
* Add prepublish script
Compiles icons into both static js files (icons/{filename}.js) and
into a static index.js. The latter is not tree-shakeable.
Closes#941, closes#751
* Add information on tree-shaking to README
* Remove index.js after publishing
* Change 'prepublish' to 'prepublishOnly'
* Link to webpack in README
* Simplify postpublish cleanup
Thanks @ericcornelissen
* Fix quote usage in prepublish.js
* Fix quote usage in utils.js
* Optimized file size of prepublish output
* Improved readability of prepublish script