[openstreetmap-website] use ruby 2.1.8 on travis (#1130)

[Nik Nyby]

You can view, comment on, or merge this pull request online at:

  https://github.com/openstreetmap/openstreetmap-website/pull/1130

-- Commit Summary --

  * use ruby 2.1.8 on travis

-- File Changes --

    M .travis.yml (2)

-- Patch Links --

https://github.com/openstreetmap/openstreetmap-website/pull/1130.patch
https://github.com/openstreetmap/openstreetmap-website/pull/1130.diff

---
Reply to this email directly or view it on GitHub:
https://github.com/openstreetmap/openstreetmap-website/pull/1130
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