chore: resolve open dependabot security alerts

[jonathannorris]

Summary

• Resolved all open Dependabot security alerts by bumping addressable to 2.9.0 and json to 2.19.4 across openfeature-flagsmith-provider, openfeature-go-feature-flag-provider, and openfeature-meta_provider

[gemini-code-assist]

Code Review

This pull request updates dependency versions in several Gemfile.lock files across different providers. The reviewer identified multiple critical issues: the specified Bundler version (4.0.10) is invalid as it has not been released, and the versions for the 'public_suffix' (7.0.5) and 'json' (2.19.4) gems do not exist on RubyGems, which will lead to build failures.

[jonathannorris]

The test_flagd_provider failures are pre-existing and unrelated to this PR — the flagd provider lockfile is unchanged. The failing test checks fractional targeting output for the color-palette-experiment flag, and targeting key "1234" now resolves to #4b5563 (grey) instead of the expected #b91c1c (red). The last passing run was April 1st, so this breakage predates this PR. Looks like it's related to the fractional evaluation hashing change tracked in #73.