Enabled support for twig v3

[chq81]

Hey. I enabled the use of twig v3 again. I am not sure why it was dropped.

[coveralls]

Pull Request Test Coverage Report for Build 193

• 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 99.163%

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Totals
Change from base Build 186:	0.0%
Covered Lines:	474
Relevant Lines:	478

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💛 - Coveralls

[migo315]

Thanks for that. I think this was a mistake.

[chq81]

@migo315 Thanks a lot, and thanks for you awesome work.