Bump oj from 2.1.2 to 3.6.7

[dependabot-preview]

Bumps oj from 2.1.2 to 3.6.7.

Changelog

Sourced from oj's changelog.

3.6.7 - 2018-08-26

• Fixed incorrect check in StreamWriter when adding raw JSON.

3.6.6 - 2018-08-16

• Fixed Debian build issues on several platforms.

• oj_slash_string is now frozen.

3.6.5 - 2018-07-26

• Fixed GC issue with Oj::Doc.

• Fixed issue with time encoding with Windows.

3.6.4 - 2018-07-10

• JSON.generate() now sets the to_json option as expected.

• Show :create_additions in the default options. It did not appear before.

3.6.3 - 2018-06-21

• Fixed compat dump compilation error on Windows.

3.6.2 - 2018-05-30

• Regex encoded correctly for rails when using to_json.

• ActiveSupport::TimeWithZone optimization fixed.

3.6.1 - 2018-05-16

• Fixed realloc bug in rails dump.

3.6.0 - 2018-05-01

• Add optimization for Rails ActiveRecord::Result encoding.

3.5.1 - 2018-04-14

• Fixed issue with \u0000 terminating keys early.

• Add trace for calls to to_json and 'as_json`.

3.5.0 - 2018-03-04

• A trace option is now available in all modes. The format roughly follows the Ruby trace format.

... (truncated)

Commits

• See full diff in compare view

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[greysteil]

This should be totally fine - tests would be failing if not.

The changelog entry for v3.0.0 is here - not much detail, but it looks like 3.0.0 wasn't very breaking.

[kristinalim]

It indeed looks safe to upgrade.

For testing, best to do a smoke test of these sensitive JSON usages on the staging server.

• Stripe payment for a subscription should be processed properly
• Product cache integrity checking should still be good (Admin > Configuration > Caching) - Status should say "OK"

[sauloperez]

we should hold on this one until we don't release 1.9.0. There are already too many changes.

[dependabot-preview]

Superseded by #2736.