Update ruby-i18n to 1.8.2.
1.8.2 (2020-01-13)
* Restoration of #499 via #509 - deep_merge! & deep_merge methods appear
again in the Hash refinement.
* An issue was introduced in v1.7.0 where some translations were returned as
hashes, see #510. This was fixed in 1b5e345, and is available in this
release.
1.8.1 (2020-01-13)
* Reverted #499 in #508 due to #507 - missing deep_merge method.
1.8.0 (2020-01-13)
* Use Rails' implementation of deep_merge when chaining fallback backends -
#499.
1.7.1 (2020-01-13)
* I18n is now tested with GitHub Actions, instead of Travis CI.
* Fixed issue introduced in v1.7.0 (04a814b) where count option was not
preserved - #503
* #501 adds a comment that explains that you will need to double-splat
keyword arguments given to I18n.t to avoid warnings in Ruby 2.7.
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