Update gems

This MR contains the following updates:

Package	Type	Update	Change
http_parser.rb	ironbank-rubygems	minor	0.7.0 -> 0.8.0
json	ironbank-rubygems	minor	2.5.1 -> 2.6.1
oj	ironbank-rubygems	patch	3.13.8 -> 3.13.9
tzinfo-data	ironbank-rubygems	patch	1.2021.3 -> 1.2021.5

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