Move from explicit es2015 to babel preset env

[pgebheim]

This is both the new fancy thing to do and ensures compatibility with node code that uses -env instead of explicit es201x.

[coveralls]

Coverage remained the same at 98.795% when pulling 3b7951c on use-babel-preset-env into 80045d7 on master.

[coveralls]

Coverage remained the same at 98.795% when pulling 3c76baf on use-babel-preset-env into a393b60 on master.

[holgerd77]

Looks good.

[tinybike]

Looks good to me!

[tinybike]

@wanderer if this looks okay to you, please merge + publish to npm when you get a chance 😄

[holgerd77]

Just rebased this.

[holgerd77]

Review again after rebase, looks good. Still. 😄

[tinybike]

Is @wanderer still point man for this repo and for npm updates? Would be good to get this merged and pushed to npm!

[holgerd77]

@tinybike I already asked Martin @wanderer some weeks ago, if npm publishing rights can be expanded to an active developer, e.g. @axic or me. Would you also be available for this? Will try to reach out to him again.

[holgerd77]

@tinybike tried is the classic way, just sent an email. 😸

[tinybike]

Sounds good! Yes, I'd be more than happy to help keep this repo up-to-date. My npm username is tinybike.

[axic]

@holgerd77 since you understand babel way better, please feel free to merge.