Bump next from 6.1.2 to 7.0.2 (#2508)

Bumps [next](https://github.com/zeit/next.js) from 6.1.2 to 7.0.2.
- [Release notes](https://github.com/zeit/next.js/releases)
- [Commits](https://github.com/zeit/next.js/compare/6.1.2...7.0.2)

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

package.json

@@ -168,7 +168,7 @@
     "mocha-env-reporter": "^3.0.0",
     "mocha-junit-reporter": "^1.18.0",
     "mocha-yaml-loader": "^1.0.3",
-    "next": "^6.1.1",
+    "next": "^7.0.2",
     "nock": "11.0.0-beta.2",
     "node-fetch": "^2.3.0",
     "node-mocks-http": "^1.7.3",