Remove empty "devDepencies:{}"
Remove empty "devDepencies:{}"

Leave devDependencies that lists babel-cli and preset-env.

The build fails with the empty devDependencies with this error:

$ yarn start
yarn run v1.6.0
(node:7104) [DEP0005] DeprecationWarning: Buffer() is deprecated due to
security and usability issues.
 Please use the Buffer.alloc(), Buffer.allocUnsafe(), or Buffer.from()
 methods instead.
 $ babel babel --out-dir dist/js -w
 'babel' is not recognized as an internal or external command,
 operable program or batch file.
 error Command failed with exit code 1.
 info Visit https://yarnpkg.com/en/docs/cli/run for documentation about
 this command.

I think this error is triggered if the build host doesn't have a globally
installed babel.

Esshahn/spritemate,Esshahn/spritemate,Esshahn/spritemate