Updates the requirements on [@types/showdown](https://github.com/DefinitelyTyped/DefinitelyTyped) to permit the latest version.
- [Release notes](https://github.com/DefinitelyTyped/DefinitelyTyped/releases)
- [Commits](https://github.com/DefinitelyTyped/DefinitelyTyped/commits

)

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

* Update notifications.ts

* Update notifications.ts

* Update notifications.ts

* Update notifications.ts

* Add missing semicolon

* Improve readability

* Fix typo

New Crowdin translations

Patreon API updates

New Crowdin translations

Update nodemailer requirement from 4.7.0 to 5.0.0

Update moment requirement from 2.22.2 to 2.23.0

Update vue-marquee-text-component requirement from 1.1.0 to 1.1.1

Merge pull request #3817 from syuilo/dependabot/npm_and_yarn/@fortawesome/fontawesome-svg-core-1.2.12

Update @fortawesome/fontawesome-svg-core requirement from 1.2.8 to 1.2.12

Merge pull request #3819 from syuilo/dependabot/npm_and_yarn/@fortawesome/free-brands-svg-icons-5.6.3

Update @fortawesome/free-brands-svg-icons requirement from 5.6.0 to 5.6.3

Update @types/elasticsearch requirement from 5.0.29 to 5.0.30