Use toml-test version in -script output, instead of @latest

Release 2.1

Release 2.0

There's a few incompatible changes to the CLI interface as it was all
getting quite messy, so release as 2.0.

This also enables TOML 1.1 default (via the github.com/BurntSushi/toml
update).

Fixes #168
Fixes #173

Release v1.6.0

This is a small maintaince release which fixes a few small bugs in the
test runner and adds a few small tests.

Release v1.5.0

Changes
-------
- This release requires Go 1.19 to build.

- Add quite a lot of new test.

- Only "pass" an invalid test if the decoder exits with exactly exit 1, rather
  than any exit >0. This catches segfaults, panics, and other crashes which
  shouldn't be considered "passing".

- Tests are now run in parallel, defaulting to the number of available cores.
  Use the `-parallel` flag to set the number of cores to use.

- Few small improvements to toml-test runner output.

New features
------------
- The `-copy` flag copies all tests to the given directory (taking the `-toml`
  flag in to account). This is much easier than manually copying the files.

- Add `-errors` flag to test expected error messages for invalid tests. See
  `-help` for details.

- Add `-print-skip`, to print out a small bash/zsh script with `-skip` flags for
  tests that failed. Useful to get a list of "known failures" for CI
  integrations and such.

- Add `-timeout` flag to set the maximum execution time per test, to catch
  infinite loops and/or pathological cases. This defaults to 1s, but can
  probably be set (much) lower for most implementations.

- Add `-int-as-float` flag, for implementations that treat all numbers as
  floats.

- Add `-cat` flag to create a large (valid) TOML document, for benchmarks and
  such.

Release v1.4.0

- Move from github.com/BurntSushi/toml-test to github.com/toml-lang/toml-test

  In most cases things should keep working as GitHub will redirect things, but
  you'll have to update the path if you install from source with `go install`.

- Both TOML 1.0 and the upcoming TOML 1.1 are now supported.

  If you implemented your own test-runner, then you should only copy/use the
  files listed in `tests/files-toml-1.0.0` (or `tests/files-toml-1.1.0`). Some
  things that are invalid in 1.0 are now valid in 1.1.

  Also see "Usage without toml-test binary" in the README.md.

  For the `toml-test` tool the default remains 1.0; add `-toml 1.1.0` to use TOML
  1.1.

- Add a few tests, and improve output on test failures a bit.

Merge pull request #127 from ndtoan96/master

Add testcases for tab character in string

Better check for test directory not existing

It would work when using the embedded tests, but failed when using
"-testdir tests".

Fixes #117

Update github.com/BurntSushi/toml

Release v1.0.1

This fixes a cyclic module dependency issue with
github.com/BurntSushi/toml that prevented some people from installing
this from source. See #74 for some details.

There are no functional changes.