Bump datatables.net from 2.3.1 to 2.3.4

Bumps [datatables.net](https://github.com/DataTables/Dist-DataTables) from 2.3.1 to 2.3.4.
- [Release notes](https://github.com/DataTables/Dist-DataTables/releases)
- [Commits](https://github.com/DataTables/Dist-DataTables/compare/2.3.1...2.3.4

)

---
updated-dependencies:
- dependency-name: datatables.net
  dependency-version: 2.3.4
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

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