Update @lint-todo/utils to 13.1.1

[Techn1x]

I recently contributed to @lint-todo/utils package and would love to see that fix given to everyone.

This fix ensures --compact-todo ends the file with a newline (previously it was always stripping the final newline in the file). This avoids other knock on issues like;

• doubled operation lines after an update-todo or other "append" task, which then cause;
  • lint errors to reappear
  • more merge conflicts
  • errornous lines in the file that are never cleaned up

Above all I think it would be worthwhile just to ensure that reported issues in ETL are as reported and not subtly caused by the above.
Fixes #2482

[Techn1x]

Note that while it fixes the commands - users with .lint-todo files generated by a prior version of @lint-todo/utils where they don't have the newline at the end will still have their next command append and cause a doubled-operation line. But hopefully that just goes away over time.

[Techn1x]

Not sure what that failing windows test is, but I assume it's flaky and not something to do with this PR.

[bmish]

Since this is just a minor version upgrade (https://github.com/lint-todo/utils/releases/tag/v13.1.1), and we use caret version ranges anyway, I'll go ahead and merge this, thanks. Note that we will get upgrades like this from Dependabot too.

Our Node 14 tests are a bit flaky.

[peternowee]

@bmish Title should be 13.1.1.

[Techn1x]

thx fixed