Bump gopkg.in/yaml.v2 from 2.2.4 to 2.2.7

[dependabot-preview[bot]]

Bumps gopkg.in/yaml.v2 from 2.2.4 to 2.2.7.

Commits

- [`1f64d61`](https://github.com/go-yaml/yaml/commit/1f64d6156d11335c3f22d9330b0ad14fc1e789ce) Fix issue in simple_keys improvements ([#548](https://github-redirect.dependabot.com/go-yaml/yaml/issues/548)) - [`a95acef`](https://github.com/go-yaml/yaml/commit/a95acef3719e5e9f7614cc90a119dee4699291eb) Update travis config to use latest go versions ([#540](https://github-redirect.dependabot.com/go-yaml/yaml/issues/540)) - [`36babc3`](https://github.com/go-yaml/yaml/commit/36babc3691687601732d9e2571b698be4116469a) Port stale simple_keys fix to v2 ([#543](https://github-redirect.dependabot.com/go-yaml/yaml/issues/543)) - [`770b8da`](https://github.com/go-yaml/yaml/commit/770b8dae4cf00919e5eafffbd8d58186294b61b5) Fix Decorder doc typo ([#494](https://github-redirect.dependabot.com/go-yaml/yaml/issues/494)) - [`1ed5951`](https://github.com/go-yaml/yaml/commit/1ed59511881fdb008c1e618e9f219ce0704e658e) Add Go 1.10-13 to travis setup. - [`f90ceb4`](https://github.com/go-yaml/yaml/commit/f90ceb4f409096b60e2e9076b38b304b8246e5fa) Fix check for non-map alias merging in v2 ([#529](https://github-redirect.dependabot.com/go-yaml/yaml/issues/529)) - [`970885f`](https://github.com/go-yaml/yaml/commit/970885f01c8bc1fecb7ab1c8ce8e7609bda45530) Trivial style tuning on last change. - See full diff in [compare view](https://github.com/go-yaml/yaml/compare/v2.2.4...v2.2.7)

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[codecov-io]

Codecov Report

Merging #55 into master will not change coverage. The diff coverage is n/a.

@@           Coverage Diff           @@
##           master      #55   +/-   ##
=======================================
  Coverage   31.42%   31.42%           
=======================================
  Files           7        7           
  Lines         140      140           
=======================================
  Hits           44       44           
  Misses         88       88           
  Partials        8        8

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