localize-router fix issue with changeLanguage when route parameters are used

PR Checklist

Please check if your PR fulfills the following requirements:

[ ] Tests for the changes have been added (for bug fixes / features)
[ ] Docs have been added / updated (for bug fixes / features)

PR Type

What kind of change does this PR introduce?

[x] Bugfix
[ ] Feature
[ ] Code style update (formatting, local variables)
[ ] Refactoring (no functional changes, no api changes)
[ ] Build related changes
[ ] Documentation content changes
[ ] Other... Please describe:

What is the current behavior?

Issue Number: #151

(copied from issue) Using angular 7+ if a route as parameters, for example :name or :id, this method on this line "...Object.keys(snapshot.params).length ? [snapshot.params] : []," will add to the route the following ";name=valueofthename" or ";id=valueoftheid". There is another problem on the line above on the urlPart this urlPart I think needs to be splited by "/" otherwise if my route is something like "person/:name" the the result of calling the method changeLanguage that calls the traverseSnapshot will result in something like "lang/person%2Fvalueofthename;name=valueofthename".

What is the new behavior?

It will correctly assemble the route when changing the language and using route params.

Does this PR introduce a breaking change?

[ ] Yes
[x] No

Other information

This is now an issue for over 3 months and nothing happened. I'm using this fix in production for this time and nothing broke. I think we are save to merge this PR without adding new tests.

Credits to cywolf (https://github.com/cywolf) for the fix!