Atrium: update gradle-wrapper to latest version

[robstoll]

Code related feature

• update the gradle wrapper
• rename the resulting gradlew back to gr/gr.bat

Your first contribution?

• Write a comment I'll work on this if you would like to take this issue over.
  This way we get the chance to revise the description in case things have changed in the meantime,
  we might give you additional hints and we can assign the task to you, so that others do not start as well.
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[pr0t3us]

I'll work on this

[robstoll]

@pr0t3us unfortunately,I had to revert your commit as it caused problems in intellij. Projects could no longer be imported properly. Do you fancy to give it another shot and try to fix the problem with importing? Following the failure reported by IDEA

Warning:<i><b>root project 'atrium': Unable to resolve additional project configuration.</b>
Details: org.gradle.api.artifacts.ResolveException: Could not resolve all dependencies for configuration ':atrium-core-robstoll-lib-js:compileOnly'.
Caused by: org.gradle.internal.component.AmbiguousVariantSelectionException: More than one variant of project :atrium-translations-en_GB-js matches the consumer attributes:
  - Configuration ':atrium-translations-en_GB-js:runtimeElements':
      - Unmatched attributes:
          - Found artifactType 'jar' but wasn't required.
          - Found org.gradle.category 'library' but wasn't required.
          - Found org.gradle.dependency.bundling 'external' but wasn't required.
          - Found org.gradle.jvm.version '8' but wasn't required.
          - Found org.gradle.libraryelements 'jar' but wasn't required.
          - Found org.gradle.usage 'kotlin-runtime' but wasn't required.
      - Compatible attributes:
          - Required org.jetbrains.kotlin.localToProject 'local to :atrium-core-robstoll-lib-js' and found compatible value 'public'.
          - Required org.jetbrains.kotlin.platform.type 'js' and found compatible value 'js'.
  - Configuration ':atrium-translations-en_GB-js:runtimeElements' variant classes:
      - Unmatched attributes:
          - Found artifactType 'java-classes-directory' but wasn't required.
          - Found org.gradle.category 'library' but wasn't required.
          - Found org.gradle.dependency.bundling 'external' but wasn't required.
          - Found org.gradle.jvm.version '8' but wasn't required.
          - Found org.gradle.libraryelements 'classes' but wasn't required.
          - Found org.gradle.usage 'kotlin-runtime' but wasn't required.
      - Compatible attributes:
          - Required org.jetbrains.kotlin.localToProject 'local to :atrium-core-robstoll-lib-js' and found compatible value 'public'.
          - Required org.jetbrains.kotlin.platform.type 'js' and found compatible value 'js'.
  - Configuration ':atrium-translations-en_GB-js:runtimeElements' variant resources:
      - Unmatched attributes:
          - Found artifactType 'java-resources-directory' but wasn't required.
          - Found org.gradle.category 'library' but wasn't required.
          - Found org.gradle.dependency.bundling 'external' but wasn't required.
          - Found org.gradle.jvm.version '8' but wasn't required.
          - Found org.gradle.libraryelements 'resources' but wasn't required.
          - Found org.gradle.usage 'java-runtime' but wasn't required.
      - Compatible attributes:
          - Required org.jetbrains.kotlin.localToProject 'local to :atrium-core-robstoll-lib-js' and found compatible value 'public'.
          - Required org.jetbrains.kotlin.platform.type 'js' and found compatible value 'js'.</i>

[piyushmor]

Hi @robstoll , I can take this over. Also, Gradle 6.0 is out!

[robstoll]

@piyushmor un-assigning you so that others can take over, as you don't seem to work on it any more. Let me know in case you want to take it up again.