Fix for generation of invalid json

[dgsuarez]

Seems like the fix introduced in https://github.com/pact-foundation/pact-support/commit/f54a97c93fdaa3bd769b8963e290358143862070 has a couple of issues:

• It doesn't insert the newline for arrays
• It inserts newlines when it finds {} or [] inside a string in the json document, which makes it an invalid document.

We've ran into the second issue, it's preventing us from upgrading since some of our pipelines fail.

The solution is hacky, it relies on the json being pretty formatted. In that case each line should have a single value, and the {} or [], with an extra , should be the last content in the line.

{
  "empty_array": [],
  "other": {
    "more": "fields"
  },
  "empty_hash": {}
}

[YOU54F]

thanks @dgsuarez, appreciate the extra eyes and fix

could you update the commit to fix: desc as we use our commit messages in the release process to choose the correct version number.

without it, it won’t recognise the change at release time

[dgsuarez]

Got it, done @YOU54F 👍