new sol::filters (currently undocumented)
new gc tests, new plain_type tests
core abstractions over usertypes streamlined
SOL_STRINGS_ARE_NUMBERS triggers added
update single
From the Catch docs:
Please note that the THROW family of assertions expects to be passed a single
expression, not a statement or series of statements. If you want to check a
more complicated sequence of operations, you can use a C++11 lambda function.
https://github.com/philsquared/Catch/blob/master/docs/assertions.md
In current versions of Catch violating this causes a build error.
