Remove dependency on jms/translation-bundle

[thelem]

The only occurrences of the string "JMS" that I can find anywhere in the module are:

• In the changelog and readme
• In composer.json
• In tool-id/tool-name attributes in the translation files. These seem to be effectively comments.
• In random strings in package-lock.json and *.map files (unrelated to JMS Translation bundle)

Based on #10 I think this package was added as a dependency by mistake, and we've been maintaining it ever since.

We do use the Symfony translation service, so we should add a direct dependency on that.

Pull request coming soon.