Replace babel-preset-latest with babel-preset-env

[aduth]

babel-preset-latest has been deprecated in favor of babel-preset-env. With consideration of recent browser support changes, combined with previously established browser support, browser targets have been configured as follows:

[
	"last 2 Chrome versions",
	"last 2 Firefox versions",
	"last 2 Safari versions",
	"last 2 iOS versions",
	"last 1 Android version",
	"last 1 ChromeAndroid version",
	"ie 11"
]

The advantage of defining browser support explicitly is that Babel can optimize to remove unnecessary transformations when supported by all supported versions.

Testing instructions:

Verify that build completes without errors.

[BE-Webdesign]

Looks good! Needs a rebase and merge.

[aduth]

Thanks for the review @BE-Webdesign !