Add routes for single-query tests, revert special quote escaping

1. The single-query test should not return an array, so create routes
/db and /dbraw that run a single query and return the first response.

2. Remove calls to vec that apparently were not needed. (oops)

3. Revert special escaping for quotes.
Update dependencies to latest versions
Merge branch 'verify' of github.com:TechEmpower/FrameworkBenchmarks into verify