Bump twitter-api-v2 from 1.17.2 to 1.18.1

Bumps [twitter-api-v2](https://github.com/plhery/node-twitter-api-v2) from 1.17.2 to 1.18.1.
- [Release notes](https://github.com/plhery/node-twitter-api-v2/releases)
- [Changelog](https://github.com/PLhery/node-twitter-api-v2/blob/master/changelog.md)
- [Commits](PLhery/node-twitter-api-v2@1.17.2...1.18.1)

---
updated-dependencies:
- dependency-name: twitter-api-v2
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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

package.json

@@ -24,7 +24,7 @@
     "koa": "^2.15.3",
     "koa-bodyparser": "^4.4.1",
     "koa-handlebars": "^2.0.0",
-    "twitter-api-v2": "^1.17.2"
+    "twitter-api-v2": "^1.18.1"
   },
   "devDependencies": {
     "@domenic/eslint-config": "^4.0.1",