build: bump ffi from 1.12.1 to 1.12.2 in /docs

Bumps [ffi](https://github.com/ffi/ffi) from 1.12.1 to 1.12.2.
- [Release notes](https://github.com/ffi/ffi/releases)
- [Changelog](https://github.com/ffi/ffi/blob/master/CHANGELOG.md)
- [Commits](https://github.com/ffi/ffi/compare/1.12.1...1.12.2)

Signed-off-by: dependabot-preview[bot] <support@dependabot.com>
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dependabot-preview[bot] 2020-02-01 14:05:27 +00:00 committed by GitHub
parent 040e291188
commit 31be6efe20
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@ -28,7 +28,7 @@ GEM
execjs (2.7.0)
faraday (1.0.0)
multipart-post (>= 1.2, < 3)
ffi (1.12.1)
ffi (1.12.2)
forwardable-extended (2.6.0)
gemoji (3.0.1)
github-pages (204)