v1.6 Upgrade to node 20

Update action to use Node 20 since Node 16 is not supported anymore in GitHub actions
Contributed by @Hermanverschooten

v1.5 Upgrade elm-tooling dep to 1.10 with elm-json 0.2.13

Add support to elm-json 0.2.13 (fixed upgrade command) via elm-tooling 1.10

v1.4 support elm-test-rs v3.0

v1.4 upgrade elm-tooling dep to v1.9

v1.3 support elm-test-rs 2.0

Update all dependencies of this action, including elm-tooling that now supports elm-test-rs 2.0

Use cwd argument of elmToolingCli()

Use the cwd argument instead of actually changing the current working directory manually.

Support of elm-test-rs

With the update of elm-tooling to version 1.3, there is now support of elm-test-rs 1.0.0

Initial elm-tooling action

This action lets you install elm and other elm tooling in your CI via your elm-tooling.json