Upgrade babel deps

[marcofugaro]

Some proposals plugins have changes their options, for example the babel-proposal-decorators has added a new decoratorsBeforeExport option, setting this option was not possible in the 7.0.0 version so the configuration was throwing an error.

Should be fixed just by upgrading the dependencies.

[coveralls]

Pull Request Test Coverage Report for Build 16

• 0 of 0 changed or added relevant lines in 0 files are covered.
• No unchanged relevant lines lost coverage.
• Overall coverage remained the same at 100.0%

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Totals
Change from base Build 15:	0.0%
Covered Lines:	77
Relevant Lines:	77

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💛 - Coveralls

[wzhouwzhou]

+1, some feedback and presence from @insin would be appreciated
Additionally, some new options such as classPrivateProperties have been introduced, it would be great to have those added.
Additionally, attempting to directly install from a branch fails to build /lib. Manually building lib fails to convert import/export correctly. Finally Plugin/Preset files are not allowed to export objects, only functions prevents usage of module

[insin]

Plugin options weren't made configurable as there were no meaningful options in the 7.0.0 versions - this should be fixed as of v0.2.0