Use vendoring for backward compatibility The switch of the Madon library to Go modules breaks builds with Go version < 1.11 since the import path now contains "v2". This patch adds vendoring so that it can still build with those versions. Let's try to re-enable Travis builds with Go v1.8-1.11...

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language: go

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sudo: required

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go:

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  - 1.7.5

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  - 1.8

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  - tip

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os:

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  - linux

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matrix:

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  allow_failures:

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    - go: tip

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  fast_finish: true

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script:

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  - make check