Upgrade to JDK 16, Kotlin 1.3.21 and Gradle 7.1.1

examples/build.gradle.kts

@@ -1,7 +1,7 @@
 plugins {
     id("application")
     id("com.github.ben-manes.versions") version "0.39.0"
-    kotlin("jvm") version "1.5.10"
+    kotlin("jvm") version "1.5.21"
 }
 
 // ./gradlew run runJava
@@ -26,7 +26,7 @@ application {
 tasks {
     register("runJava", JavaExec::class) {
         group = "application"
-        main = "com.example.AkismetSample"
+        mainClass.set("com.example.AkismetSample")
         classpath = sourceSets.main.get().runtimeClasspath
     }
 }

examples/gradle/wrapper/gradle-wrapper.properties

@@ -1,5 +1,5 @@
 distributionBase=GRADLE_USER_HOME
 distributionPath=wrapper/dists
-distributionUrl=https\://services.gradle.org/distributions/gradle-7.0.2-bin.zip
+distributionUrl=https\://services.gradle.org/distributions/gradle-7.1.1-bin.zip
 zipStoreBase=GRADLE_USER_HOME
 zipStorePath=wrapper/dists

examples/gradlew

@@ -72,7 +72,7 @@ case "`uname`" in
   Darwin* )
     darwin=true
     ;;
-  MINGW* )
+  MSYS* | MINGW* )
     msys=true
     ;;
   NONSTOP* )