Bump plugin version

Author: mannodermaus

gradle.properties

@@ -12,7 +12,7 @@ LICENSE_NAME                                = Apache-2.0
 PLUGIN_GROUP_ID                             = de.mannodermaus.gradle.plugins
 PLUGIN_ARTIFACT_ID                          = android-junit5
 PLUGIN_DESCRIPTION                          = Unit Testing with JUnit 5 for Android.
-PLUGIN_RUNTIME_VERSION_NAME                 = 1.0.31-SNAPSHOT
+PLUGIN_RUNTIME_VERSION_NAME                 = 1.0.31
 PLUGIN_RUNTIME_VERSION_NAME_LATEST_STABLE   = 1.0.30
 
 # Artifact configuration (embedded-runtime)