Update karma-viewport requirement to ^1.0.2 in /build

Updates the requirements on [karma-viewport](https://github.com/squidfunk/karma-viewport) to permit the latest version.
- [Release notes](https://github.com/squidfunk/karma-viewport/releases)
- [Changelog](https://github.com/squidfunk/karma-viewport/blob/master/CHANGELOG)
- [Commits](https://github.com/squidfunk/karma-viewport/commits/1.0.2

)

Signed-off-by: dependabot[bot] <support@dependabot.com>