Bump Groovy to version 4 (#468)

* Bump Groovy to version 4

- Groovy 4.0.24
- Spock 2.3-groovy-4.0
- Gradle 7.6

* Trailing linebreak

Author: artamonovkirill

bin/create_exercise.groovy

@@ -18,8 +18,8 @@ repositories {
 }
 
 dependencies {
-    testImplementation "org.spockframework:spock-core:2.0-M2-groovy-3.0"
-    implementation "org.codehaus.groovy:groovy-all:3.0.2"
+    testImplementation "org.spockframework:spock-core:2.3-groovy-4.0"
+    implementation "org.apache.groovy:groovy:4.0.24"
 }
 
 test {

build.gradle

@@ -8,7 +8,7 @@ subprojects {
     apply plugin: 'groovy'
 
     task wrapper(type: Wrapper) {
-        gradleVersion = '6.2'
+        gradleVersion = '7.6'
         onlyIf {
             projectDir.list().contains('build.gradle')
         }
@@ -68,5 +68,5 @@ def logCompileTaskSourcePath(Project project, String taskName) {
 }
 
 wrapper {
-    gradleVersion = '6.2'
-}
+    gradleVersion = '7.6'
+}