Bump ua-parser-js in /relay-compiler-language-swift (#17)

Bumps [ua-parser-js](https://github.com/faisalman/ua-parser-js) from 0.7.21 to 0.7.28.
- [Release notes](https://github.com/faisalman/ua-parser-js/releases)
- [Commits](faisalman/ua-parser-js@0.7.21...0.7.28)

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