support ember-template-lint v4 command-line syntax

[dwickern]

Use --format=json for version 4+. Continue using --json for older versions.

• version 3.1.0 (2021-03) adds --format=json https://github.com/ember-template-lint/ember-template-lint/pull/1340
• version 3.3.0 (2021-04) deprecates --json https://github.com/ember-template-lint/ember-template-lint/pull/1907
• version 4.0.0 (2022-01) removes --json https://github.com/ember-template-lint/ember-template-lint/pull/2193

Fixes #428

[Turbo87]

hmm... am I using this wrong? 🤔

[dwickern]

I think it's this issue: https://github.com/JetBrains/gradle-intellij-plugin/issues/990

It works for me after running a clean. I tested against template-lint 2.21 and 4.10.

[Turbo87]

indeed, a clean run has fixed it. thanks :)