## Changes
- All options are runtime type checked
- Default options now specified in the codebase
- Removed `assign_value_function` (should offer a nice speedup in
regular Lua)
- Modified decoder tests to re-add toml-test tags, so this is no
longer needed
- NOTE: this does mean that the toml-test fails for non Lua 5.3-5.5.
- Added comparison table to README with other TOML parsers
- Can now specify encoding dates/times as strings _or tables!_
