Bump @sinonjs/referee from 2.6.0 to 3.2.0

Bumps [@sinonjs/referee](https://github.com/sinonjs/referee) from 2.6.0 to 3.2.0.
- [Release notes](https://github.com/sinonjs/referee/releases)
- [Commits](https://github.com/sinonjs/referee/commits/v3.2.0)

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

package.json

@@ -27,7 +27,7 @@
     "@sinonjs/samsam": "^3.1.0"
   },
   "devDependencies": {
-    "@sinonjs/referee": "^2.6.0",
+    "@sinonjs/referee": "^3.2.0",
     "eslint": "^4.19.1",
     "eslint-config-sinon": "^1.0.3",
     "eslint-plugin-ie11": "^1.0.0",