Copy over only Kotlin external dependencies from super configurations

This avoids project resolution failures or variant failures from
capabilities conflicts. As Kotlin stashes its stdlib magically as an
implicit dependency that appears at runtime (versus a default dependency
as per Gradle's idioms), we have to special case its inclusion for those
projects.

build.gradle

@@ -23,7 +23,7 @@ apply plugin: 'nexus'
 apply plugin: 'codenarc'
 
 group = 'com.github.ben-manes'
-version = '0.32.0'
+version = '0.33.0'
 
 sourceCompatibility = '1.8'
 

src/main/groovy/com/github/benmanes/gradle/versions/updates/Resolver.groovy

@@ -131,9 +131,13 @@ class Resolver {
       copy.setCanBeResolved(true)
     }
 
-    // Resolve using the latest version of explicitly declaired dependencies and retains those
-    // inherited from the super configurations (which may be required for variant resolution).
-    Set<Dependency> inherited = (configuration.allDependencies - configuration.dependencies)
+    // Resolve using the latest version of explicitly declaired dependencies and retains Kotlin's
+    // inherited stdlib dependencies from the super configurations. This is required for variant
+    // resolution, but the full set can break consumer capability matching.
+    Set<Dependency> inherited = configuration.allDependencies.findAll { dependency ->
+      (dependency instanceof ExternalDependency) && (dependency.group == 'org.jetbrains.kotlin')
+    }.minus(configuration.dependencies)
+
     copy.dependencies.clear()
     copy.dependencies.addAll(latest)
     copy.dependencies.addAll(inherited)