Bump stopword from 3.0.1 to 3.1.1

Bumps [stopword](https://github.com/fergiemcdowall/stopword) from 3.0.1 to 3.1.1.
- [Release notes](https://github.com/fergiemcdowall/stopword/releases)
- [Commits](fergiemcdowall/stopword@v3.0.1...v3.1.1)

---
updated-dependencies:
- dependency-name: stopword
  dependency-type: direct:development
  update-type: version-update:semver-minor
...

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

package.json

@@ -30,6 +30,6 @@
   "homepage": "https://github.com/eklem/eklem-headline-parser",
   "devDependencies": {
     "batr": "^2.1.10",
-    "stopword": "^3.0.1"
+    "stopword": "^3.1.1"
   }
 }