also:
- fixed value comparison with special floats
- added all the remaining conformance tests from BurntSushi/toml-test and iarna/toml-spec-tests
- added toml::inserter
- added license boilerplate to test files
also:
- fixed some parsing and printing ops being locale-dependent (fixes#19)
- fixed pkgconfig subdir being wrong (fixes#23)
- fixed some parsing errors at EOF when `TOML_EXCEPTIONS = 0`
- fixed some unreferenced variable warnings on older compilers
- fixed some 'maybe-uninitialized' false-positives on GCC9
- added debug/release awareness to CI tests
- added locale awareness to catch test runner
also:
- fixed column numbers being wrong when a value ended at EOF
- fixed some `print_to_stream` overloads for `char8_t`
- fixed a minor preprocessor snafu on MSVC
- fixed '\' not being escaped when printing string values
- added an initializer list constructor for tables
- added `array::flatten`
- added `table::find`
- added `table::is_inline` setter
- added `TOML_SMALL_INT_TYPE`
- added `parse_file`
- added stream operator for source_region
- added proper license notice for the utf8 decoder
- added lots more documentation and tests
