2.15.2 - Upgrade dependencies

• Update dependencies & remove package-lock.json in subpackages (@kamilmielnik via 4e0d0f7)
• Remove package-lock.json mention from bump-version.js (@kamilmielnik via 10ca393)
• Add Kelimelik to README (@kamilmielnik via 0fb95f6)

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2.15.1...2.15.2