Update uri.cpp

[TheAquaMan]

Fix for uri::swap method

[glynos]

Thanks for the PR. But what does this fix? Can you add a test?

[TheAquaMan]

Without proposed changes uri::swap method worked in incorrect way: this method swapped uri_ and uri_view_, but uri_parts_ members were not swapped, this method used other.uri_parts_ for both uri objects. This method overwrote this->uri_parts_ by other.uri_parts_ and then wrote to this->uri_parts_ to other.uri_parts_, so both uris had the same other.uri_parts_ value.
As result wrong return values for host(), port(), query(), etc, methods for one of swapped objects

[glynos]

Sorry it has taken me a while to respond. Your changes look correct, but I'd still like to see a unit test before merging this PR.

[glynos]

@TheAquaMan I applied this fix in PR #99, including a test. Can you confirm if that works for you?

[glynos]

Fix was applied on master (see PR #99)