chore(deps-dev): bump cypress from 3.3.2 to 3.4.0

Bumps [cypress](https://github.com/cypress-io/cypress) from 3.3.2 to 3.4.0.
- [Release notes](https://github.com/cypress-io/cypress/releases)
- [Commits](cypress-io/cypress@v3.3.2...v3.4.0)

Signed-off-by: dependabot-preview[bot] <[email protected]>

Author: dependabot-preview[bot]

package-lock.json

@@ -31,7 +31,7 @@
   "devDependencies": {
     "acorn": "^6.2.0",
     "chai": "^4.2.0",
-    "cypress": "^3.3.2",
+    "cypress": "^3.4.0",
     "del": "^4.1.1",
     "gulp": "^4.0.2",
     "gulp-autoprefixer": "^6.1.0",