When we're running tests, we're generally running the debug build, so it
doesn't make sense to run the (potentially cached and not yet up to
date) release build.
These are primarily for my benefit; they make it a bit easier
to run kumod for one-off scripts without running the full service,
with less "noise" than you'd get for hacking around it as I was
doing previously in the resolve-site-name script and in the lua
test runner.
The idea is that you can now define a script like:
```lua
local kumo = require 'kumo'
kumo.on('main', function(domain)
local mx = kumo.dns.lookup_mx(domain)
print(mx.site_name)
end)
```
And (more) conveniently run it like this:
```
$ kumod --policy /path/to/script --script --script-args outlook.com
outlook-com.olc.protection.outlook.com
```
I regret optimizing the structure for toml when this module was
created, as it makes it difficult to define a regular schema.
This commit introduces typed records for the queue helper
data structure, and, unfortunately, a parsing layer to adapt
between the toml data and the well-defined types.
It also adjusts how lua tests are run; previously we'd co-opt the main
flow of parsing by looking at an env var, but since the modules can now
potentially require each other (especially the typing module) we need to
de-couple from that, otherwise what happens is that we'd only ever run
the typing module tests and exit. So we now have a script that imports
all the modules and runs their respective `:test()` methods.
refs: #211
Wez Furlong