Fix dependency conflict in JQwik.

Recently JUnit was upgraded. Rebasing revealed a dependency conflict.

.github/workflows/slow.yml

@@ -50,8 +50,6 @@ jobs:
         uses: actions/setup-dotnet@v2
         with:
           dotnet-version: ${{ matrix.dotnet }}
-      - name: Build SbeTool
-        run: ./gradlew
       - name: Build .NET library
         run: ./csharp/build.sh
       - name: Run property tests

build.gradle

@@ -58,7 +58,7 @@ def checkstyleVersion = '9.3'
 def hamcrestVersion = '2.2'
 def mockitoVersion = '4.11.0'
 def junitVersion = '5.10.1'
-def jqwikVersion = '1.8.0'
+def jqwikVersion = '1.8.1'
 def jsonVersion = '20230618'
 def jmhVersion = '1.37'
 def agronaVersion = '1.20.0'
@@ -294,11 +294,17 @@ project(':sbe-tool') {
             }
 
             propertyTest(JvmTestSuite) {
+                // We should be able to use _only_ the JQwik engine, but this issue is outstanding:
+                // https://github.com/gradle/gradle/issues/21299
                 useJUnitJupiter junitVersion
 
                 dependencies {
                     implementation project()
-                    implementation "net.jqwik:jqwik:${jqwikVersion}"
+                    implementation("net.jqwik:jqwik:${jqwikVersion}") {
+                        // Exclude JUnit 5 dependencies that are already provided due to useJUnitJupiter
+                        exclude group: 'org.junit.platform', module: 'junit-platform-commons'
+                        exclude group: 'org.junit.platform', module: 'junit-platform-engine'
+                    }
                     implementation "org.json:json:${jsonVersion}"
                 }