build: bump parallel from 1.18.0 to 1.19.0 in /docs

Bumps [parallel](https://github.com/grosser/parallel) from 1.18.0 to 1.19.0.
- [Release notes](https://github.com/grosser/parallel/releases)
- [Commits](https://github.com/grosser/parallel/compare/v1.18.0...v1.19.0)

Signed-off-by: dependabot-preview[bot] <support@dependabot.com>
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dependabot-preview[bot] 2019-11-13 17:32:29 +00:00 committed by GitHub
parent 3ffd327ce8
commit 6afc4f64db
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@ -218,7 +218,7 @@ GEM
mini_portile2 (~> 2.4.0) mini_portile2 (~> 2.4.0)
octokit (4.14.0) octokit (4.14.0)
sawyer (~> 0.8.0, >= 0.5.3) sawyer (~> 0.8.0, >= 0.5.3)
parallel (1.18.0) parallel (1.19.0)
pathutil (0.16.2) pathutil (0.16.2)
forwardable-extended (~> 2.6) forwardable-extended (~> 2.6)
public_suffix (3.1.1) public_suffix (3.1.1)