Do not quote default values

[cschmatzler]

Single-quoting the value makes it impossible to use functions.

Instead, the quoting should happen in the parameter to default().

This should also close #99.

[cschmatzler]

Updated the PR to do the same for SQLite and MySQL, should now also close #90.

[spacekookie]

Hey, thanks for this PR.

Could you try rebasing your branch? I merged a bunch of PRs that have been open for way too long :see_no_evil:

Once that's taken care of I'll merge this without there being any tests for this because I'm planning on rebuilding the entire way that barrel is tested anyway