The Project.getConvention() method has been deprecated.

[Goooler]

DefaultMavenPluginDevelopmentExtension.kt:69	
  at org.gradle.api.internal.project.DefaultProject.getConvention(DefaultProject.java:593)	
  at de.benediktritter.maven.plugin.development.internal.DefaultMavenPluginDevelopmentExtension$pluginSourceSet$1.call(DefaultMavenPluginDevelopmentExtension.kt:69)	
  at de.benediktritter.maven.plugin.development.internal.DefaultMavenPluginDevelopmentExtension$pluginSourceSet$1.call(DefaultMavenPluginDevelopmentExtension.kt:34)	
  at org.gradle.api.internal.provider.DefaultProvider.calculateOwnValue(DefaultProvider.java:72)	
  at org.gradle.api.internal.provider.AbstractMinimalProvider.calculateValue(AbstractMinimalProvider.java:115)

MavenPluginDevelopmentPlugin.kt:154	
  at org.gradle.api.internal.project.DefaultProject.getConvention(DefaultProject.java:593)	
  at de.benediktritter.maven.plugin.development.MavenPluginDevelopmentPlugin$apply$1$generateTask$1$4.call(MavenPluginDevelopmentPlugin.kt:154)	
  at de.benediktritter.maven.plugin.development.MavenPluginDevelopmentPlugin$apply$1$generateTask$1$4.call(MavenPluginDevelopmentPlugin.kt:85)	
  at org.gradle.api.internal.provider.DefaultProvider.calculateOwnValue(DefaultProvider.java:72)	
  at org.gradle.api.internal.provider.AbstractMinimalProvider.calculateValue(AbstractMinimalProvider.java:115)	

• Build scan: https://scans.gradle.com/s/atdqtxnmz7ce4/deprecations?expanded=WyIzIl0&expanded-stacktrace=WyI2NSIsIjYyIl0
• Version 0.4.2

[britter]

I can reproduce this in sample/gradle-producer-build but I'm currently unable to write a test that fails because of the deprecations.

[britter]

Tried to write a test in #200 but without success. Need to dig deeper.

[Goooler]

This is a convention invocation from older Gradle but has been polished in newer versions, check
https://github.com/gradle/gradle/blob/1cf537a851c635c364a4214885f8b9798051175b/subprojects/kotlin-dsl/src/main/kotlin/org/gradle/kotlin/dsl/ProjectExtensions.kt#L100-L112

I believe we can just replace the usages in #167 without any test case.