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>

build/package.json

@@ -22,7 +22,7 @@
     "karma-jasmine-sinon": "^1.0.4",
     "karma-junit-reporter": "*",
     "karma-phantomjs-launcher": "*",
-    "karma-viewport": "^0.4.2",
+    "karma-viewport": "^1.0.2",
     "phantomjs-prebuilt": "*",
     "node-sass": "~4.9.0",
     "sinon": "<= 5.0.7"