Append transpiled es5 version

[alexbadm]

logplease package unable to used with create-react-app because it written in es6, but create-react-app doesn't allow to configure webpack bundler.
I added transpiled version of your package and put it in the es5 folder so that anyone can import it if needed.

[haadcode]

Fantastic @alexbadm, thank you! <3 Would be happy to merge this. It was requested by someone else too in #6, so this is a valuable contribution.

Could you add an ES5 example in the example directory to show how the ES5 build can be used and also to work as a test to make sure it works in the browser too?

Perhaps also consider adding a note in the README at an appropriate place to describe how the user can use logplease as a ES5 module?

[haadcode]

Nvm my previous comment @alexbadm. I can merge this as is and quickly add the examples and update README myself.

[haadcode]

Thank you for the contribution @alexbadm! Will update the readme and examples and publish a new version to npm soon (1.2.14).