jq.lua: Use temp_file strategy for non-Win32 machines

[jaredbarranco]

This method correctly handles single quotes and allows for better debugging of the plugin when users have questions. If a method/function errors out the ~/.local/share/nvim/lazy/json-nvim/temp.json or other PLUGIN_HOME dir will have the "in-progress" file.

[jaredbarranco]

Because of issues related in Issue #2

[jaredbarranco]

@VPavliashvili I did some preliminary testing with some of the functions I am commonly using.

I'll be making another PR in the next couple of weeks for some additional improvements if you're open to it.

[VPavliashvili]

@jaredbarranco I started to run tests too and found some problems
for example take this json(generated from online generator)

[
  {
    "_id": "67b3739c332882c1456e076b",
    "index": 0,
    "guid": "9a249e2b-173b-4ab9-ac77-9257d780eedb",
    "isActive": true,
    "balance": "$3,456.75",
    "picture": "http://placehold.it/32x32",
    "age": 28,
    "eyeColor": "green",
    "name": "Olga Hess",
    "gender": "female",
    "company": "REPETWIRE",
    "email": "[email protected]",
    "phone": "+1 (920) 506-2554",
    "address": "918 Fillmore Avenue, Chapin, Indiana, 8526",
    "about": "Proident ea enim sit commodo ullamco minim sint non. Cupidatat reprehenderit pariatur sit in in pariatur reprehenderit consectetur occaecat sit. Consectetur excepteur nisi adipisicing pariatur ullamco labore voluptate elit in do.\r\n",
    "registered": "2016-07-23T05:21:41 -04:00",
    "latitude": -38.870975,
    "longitude": 139.528881,
    "tags": [
      "nisi",
      "aliquip",
      "exercitation",
      "id",
      "velit",
      "eiusmod",
      "proident"
    ],
    "friends": [
      {
        "id": 0,
        "name": "Constance Mcmillan"
      },
      {
        "id": 1,
        "name": "Alexandria Lamb"
      },
      {
        "id": 2,
        "name": "Amparo Barber"
      }
    ],
    "greeting": "Hello, Olga Hess! You have 8 unread messages.",
    "favoriteFruit": "strawberry"
  }
]

When I tried to format after your PR I got this result (run :JsonMinifyFile)

[  {    "_id": "67b3739c332882c1456e076b",    "index": 0,    "guid": "9a249e2b-173b-4ab9-ac77-9257d780eedb",    "isActive": true,    "balance": "$3,456.75",    "picture": "http://placehold.it/32x32",    "age": 28,    "eyeColor": "green",    "name": "Olga Hess",    "gender": "female",    "company": "REPETWIRE",    "email": "[email protected]",    "phone": "+1 (920) 506-2554",    "address": "918 Fillmore Avenue, Chapin, Indiana, 8526",    "about": "Proident ea enim sit commodo ullamco minim sint non. Cupidatat reprehenderit pariatur sit in in pariatur reprehenderit consectetur occaecat sit. Consectetur excepteur nisi adipisicing pariatur ullamco labore voluptate elit in do.\r\n",    "registered": "2016-07-23T05:21:41 -04:00",    "latitude": -38.870975,    "longitude": 139.528881,    "tags": [      "nisi",      "aliquip",      "exercitation",      "id",      "velit",      "eiusmod",      "proident"    ],    "friends": [      {        "id": 0,        "name": "Constance Mcmillan"      },      {        "id": 1,        "name": "Alexandria Lamb"      },      {        "id": 2,        "name": "Amparo Barber"      }    ],    "greeting": "Hello, Olga Hess! You have 8 unread messages.",    "favoriteFruit": "strawberry"  }]

note extra spacing, I think this is a regress.
before your commit it looks like this:

[{"_id":"67b3739c332882c1456e076b","index":0,"guid":"9a249e2b-173b-4ab9-ac77-9257d780eedb","isActive":true,"balance":"$3,456.75","picture":"http://placehold.it/32x32","age":28,"eyeColor":"green","name":"Olga Hess","gender":"female","company":"REPETWIRE","email":"[email protected]","phone":"+1 (920) 506-2554","address":"918 Fillmore Avenue, Chapin, Indiana, 8526","about":"Proident ea enim sit commodo ullamco minim sint non. Cupidatat reprehenderit pariatur sit in in pariatur reprehenderit consectetur occaecat sit. Consectetur excepteur nisi adipisicing pariatur ullamco labore voluptate elit in do.\r\n","registered":"2016-07-23T05:21:41 -04:00","latitude":-38.870975,"longitude":139.528881,"tags":["nisi","aliquip","exercitation","id","velit","eiusmod","proident"],"friends":[{"id":0,"name":"Constance Mcmillan"},{"id":1,"name":"Alexandria Lamb"},{"id":2,"name":"Amparo Barber"}],"greeting":"Hello, Olga Hess! You have 8 unread messages.","favoriteFruit":"strawberry"}]

please consider finding the cause and fixing it
EDIT: I should have specified that I run this test on Linux

[jaredbarranco]

@VPavliashvili Thanks for catching that regression. I believe I corrected it with this commit.

I need to do some additional regression testing before I can confidently say it's ready to go.

On a related note, I'm going to open an issue for discussion around testing framework - something I think would be helpful for making sure regression like this one doesn't happen in the future.

[VPavliashvili]

@jaredbarranco Do you think it's better to incorporate unit tests first and then proceed with this PR or other way around?

[jaredbarranco]

@VPavliashvili Unit testing first would be best so that we can get a baseline expectation. If possible, I think you should be the one to generate those because I can't run ANY of the functions with master from your repo on Mac and everything but the JsonKeysTo* functions on linux.

[VPavliashvili]

@jaredbarranco unfortunately I am on a tight schedule right now and you will have to wait for a little while before I will be able to do the work, otherwise I am down to your proposition.
Also before that, if you provide some small example of some tests, it would be nice and helpful(ofc not required tho)

EDIT: Lets continue unit testing related discussion in #4 and leave this section specific to the PR