Bump com.approvaltests:approvaltests from 19.0.0 to 20.0.0

Bumps [com.approvaltests:approvaltests](https://github.com/approvals/ApprovalTests.Java) from 19.0.0 to 20.0.0.
- [Release notes](https://github.com/approvals/ApprovalTests.Java/releases)
- [Commits](approvals/ApprovalTests.Java@19.0.0...20.0.0)

---
updated-dependencies:
- dependency-name: com.approvaltests:approvaltests
  dependency-type: direct:production
  update-type: version-update:semver-major
...

Signed-off-by: dependabot[bot] <support@github.com>

app/build.gradle

@@ -30,7 +30,7 @@ dependencies {
     testImplementation 'org.junit.jupiter:junit-jupiter:5.10.0' 
     testImplementation 'org.scalatest:scalatest_2.13:3.3.0-SNAP4'
     testImplementation 'org.scalatestplus:junit-4-13_2.13:3.3.0.0-SNAP3'
-    testImplementation("com.approvaltests:approvaltests:19.0.0")
+    testImplementation("com.approvaltests:approvaltests:20.0.0")
     testImplementation("com.google.code.gson:gson:2.10.1") 
 
     // Need scala-xml at test runtime