Improving code style and adding some basic tests.

index.js

package-lock.json

package.json

src/Icons.js

src/helpers/except.js

src/helpers/fingerprint.js

src/helpers/uri.js

src/index.js

src/injector/index.js

src/validators/colors.js

src/validators/presets.js

src/validators/versioning.js

tests/basic/.gitignore

tests/basic/app.js

tests/basic/build/webpack.config.js

...icons/icon_1024x1024.9e29ee0667fc45a8662544c71ddd52ad.png

...t/icons/icon_512x512.7da9f7ef24c6ad5fe248e7f62d5593a5.png

tests/basic/test/index.html

...basic/test/manifest.c40d679438e8101de8d1ca8a0f4295ce.json

tests/complex/.gitignore