Update gems

This MR contains the following updates:

Package	Type	Update	Change
bundler	ironbank-rubygems	patch	2.2.20 -> 2.2.21
excon	ironbank-rubygems	minor	0.82.0 -> 0.83.0
faraday	ironbank-rubygems	patch	1.4.2 -> 1.4.3
fluent-plugin-elasticsearch	ironbank-rubygems	patch	5.0.4 -> 5.0.5
fluentd	ironbank-rubygems	patch	1.13.0 -> 1.13.1
fluentd		patch	1.13.0 -> 1.13.1
http	ironbank-rubygems	patch	5.0.0 -> 5.0.1
oj	ironbank-rubygems	patch	3.11.6 -> 3.11.7
oj		patch	3.11.6 -> 3.11.7

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Configuration

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