Drop support to Gradle 5

[BraisGabin]

Drop support to gradle 5.

5.0 was release at 16/Apr/2019. This moves the support 6.0. It was release at 08/Nov/2019. Maybe we coud be even more aggresive here but I think that 6.0 is a safe commitment.

As a reference the Gradle Android Plugin set the minimum gradle version to 6.1 at April 2020. And the last version of the AGP requires Gradle 6.5

[codecov]

Codecov Report

Merging #3647 (e348745) into main (1c140c8) will not change coverage.
The diff coverage is n/a.

❗ Current head e348745 differs from pull request most recent head 080984d. Consider uploading reports for the commit 080984d to get more accurate results

@@            Coverage Diff            @@
##               main    #3647   +/-   ##
=========================================
  Coverage     78.12%   78.12%           
  Complexity     2836     2836           
=========================================
  Files           467      467           
  Lines          9142     9142           
  Branches       1737     1737           
=========================================
  Hits           7142     7142           
  Misses         1058     1058           
  Partials        942      942           

---

Continue to review full report at Codecov.

Legend - Click here to learn more
Δ = absolute <relative> (impact), ø = not affected, ? = missing data
Powered by Codecov. Last update 1c140c8...080984d. Read the comment docs.

[3flex]

Kotlin's current minimum supported Gradle version is 5.4. Why not keep the versions aligned? Increasing the minimum now seems arbitrary.

That said, I believe Kotlin 1.5 will bump the minimum supported version to 6.1 so when that's released and detekt updates to 1.5 I'd support an update to 6.1.

[BraisGabin]

Good reason! Yes, let's keep us aligned with the Kotlin Gradle Plugin.

[BraisGabin]

That said, I believe Kotlin 1.5 will bump the minimum supported version to 6.1 so when that's released and detekt updates to 1.5 I'd support an update to 6.1.

I can not find anywhere about this bump of the minimum version. Do this happen?

[3flex]

It did: https://kotlinlang.org/docs/gradle.html#plugin-and-versions