Update ASN1C_ENVIRONMENT_VERSION to v0.9.29

[kellerkindt]

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The current master version - with the breaking API - is not recognizable, therefore one cannot support both versions via #ifdef or similar constructs(?)

[CLAassistant]

All committers have signed the CLA.

[coveralls]

Coverage remained the same at 70.914% when pulling 6bd8b9ce626068f77ae383ff84cf48aefc0227fe on kellerkindt:patch-1 into 00fa516f3c6ab247c263df6828143c34b1fbffa4 on vlm:master.

[vlm]

@kellerkindt Would you be willing to sign the CLA please?

[kellerkindt]

@vlm We'll, it feels like a total overkill for such a small change... But here you go :)