Support nested describes

[mkurz]

• See sbt-mocha fails with "no test suite" when there are nested describes in sbt 1.x #22

[mkurz]

[info] [info]   outer
[info] [info]     inner
[info] [info]       ! should do a thing
[info] [error] ReferenceError: expect is not defined
[info] [error]     at Context.<anonymous>(arget/web/public/test/HappyAssetSpec.js:14)
[info] [error]     at .callFn(roject/target/node-modules/webjars/mocha/lib/runnable.js:366)
[info] [error]     at Runnable.run(roject/target/node-modules/webjars/mocha/lib/runnable.js:354)
[info] [error]     at Runner.runTest(roject/target/node-modules/webjars/mocha/lib/runner.js:666)
[info] [error]     at .next(roject/target/node-modules/webjars/mocha/lib/runner.js:581)
[info] [error]     at .next(roject/target/node-modules/webjars/mocha/lib/runner.js:474)
[info] [error]     at Immediate._onImmediate(roject/target/node-modules/webjars/mocha/lib/runner.js:559)
[info] [error]     at process.processImmediate(ode:internal/timers:4[76](https://github.com/sbt/sbt-mocha/actions/runs/7703064060/job/20992712116?pr=33#step:10:77))
[info] [error] java.lang.RuntimeException: no test suite
[info] [error] 	at scala.sys.package$.error(package.scala:30)
[info] [error] 	at sbt.JUnitXmlTestsListener.$anonfun$withTestSuite$1(JUnitXmlTestsListener.scala:181)
[info] [error] 	at scala.Option.getOrElse(Option.scala:189)
[info] [error] 	at sbt.JUnitXmlTestsListener.withTestSuite(JUnitXmlTestsListener.scala:181)
[info] [error] 	at sbt.JUnitXmlTestsListener.writeSuite(JUnitXmlTestsListener.scala:260)
[info] [error] 	at sbt.JUnitXmlTestsListener.endGroup(JUnitXmlTestsListener.scala:243)
[info] [error] 	at com.typesafe.sbt.mocha.MochaTestReporting.$anonfun$handleSuite$25(MochaTestReporting.scala:220)
[info] [error] 	at com.typesafe.sbt.mocha.MochaTestReporting.$anonfun$handleSuite$25$adapted(MochaTestReporting.scala:219)
[info] [error] 	at scala.collection.immutable.List.foreach(List.scala:431)
[info] [error] 	at com.typesafe.sbt.mocha.MochaTestReporting.$anonfun$handleSuite$24(MochaTestReporting.scala:219)
[info] [error] 	at com.typesafe.sbt.mocha.MochaTestReporting.$anonfun$handleSuite$24$adapted(MochaTestReporting.scala:218)
[info] [error] 	at scala.Option.foreach(Option.scala:407)
[info] [error] 	at com.typesafe.sbt.mocha.MochaTestReporting.handleSuite(MochaTestReporting.scala:218)
[info] [error] 	at com.typesafe.sbt.mocha.MochaTestReporting.$anonfun$handleSuite$22(MochaTestReporting.scala:198)
[info] [error] 	at scala.collection.immutable.List.map(List.scala:293)
[info] [error] 	at com.typesafe.sbt.mocha.MochaTestReporting.handleSuite(MochaTestReporting.scala:197)
[info] [error] 	at com.typesafe.sbt.mocha.MochaTestReporting.$anonfun$logTestResults$3(MochaTestReporting.scala:79)
[info] [error] 	at scala.collection.immutable.List.map(List.scala:293)
[info] [error] 	at com.typesafe.sbt.mocha.MochaTestReporting.logTestResults(MochaTestReporting.scala:76)
[info] [error] 	at com.typesafe.sbt.mocha.SbtMocha$.$anonfun$mochaTestTask$7(SbtMocha.scala:180)
[info] [error] 	at scala.Option.map(Option.scala:230)
[info] [error] 	at com.typesafe.sbt.mocha.SbtMocha$.$anonfun$mochaTestTask$5(SbtMocha.scala:179)
[info] [error] 	at com.typesafe.sbt.mocha.SbtMocha$.$anonfun$projectSettings$16(SbtMocha.scala:128)
[info] [error] 	at com.typesafe.sbt.mocha.SbtMocha$.$anonfun$projectSettings$16$adapted(SbtMocha.scala:112)
[info] [error] 	at scala.Function1.$anonfun$compose$1(Function1.scala:49)
[info] [error] 	at sbt.internal.util.$tilde$greater.$anonfun$$u2219$1(TypeFunctions.scala:63)
[info] [error] 	at sbt.std.Transform$$anon$4.work(Transform.scala:69)
[info] [error] 	at sbt.Execute.$anonfun$submit$2(Execute.scala:283)
[info] [error] 	at sbt.internal.util.ErrorHandling$.wideConvert(ErrorHandling.scala:24)
[info] [error] 	at sbt.Execute.work(Execute.scala:292)
[info] [error] 	at sbt.Execute.$anonfun$submit$1(Execute.scala:283)
[info] [error] 	at sbt.ConcurrentRestrictions$$anon$4.$anonfun$submitValid$1(ConcurrentRestrictions.scala:265)
[info] [error] 	at sbt.CompletionService$$anon$2.call(CompletionService.scala:65)
[info] [error] 	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
[info] [error] 	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
[info] [error] 	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
[info] [error] 	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
[info] [error] 	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
[info] [error] 	at java.lang.Thread.run(Thread.java:750)
[info] [error] (mochaOnly) no test suite
[info] [error] Total time: 3 s, completed Jan 29, 2024 10:06:41 PM
Error:  x sbt-mocha-plugin/test 
Error:   Cause of test exception: {line 4}  Command failed: mochaOnly failed
[info] 
[info] Running sbt-mocha-plugin/test-same-webjars-different-version
[info] 
[error] java.lang.RuntimeException: Failed tests:
[error] 	sbt-mocha-plugin/test
[error] 
[error] 	at scala.sys.package$.error(package.scala:30)
[error] 	at sbt.scriptedtest.ScriptedRunner.reportErrors(ScriptedTests.scala:628)
[error] 	at sbt.scriptedtest.ScriptedRunner.runAll(ScriptedTests.scala:631)
[error] 	at sbt.scriptedtest.ScriptedRunner.run(ScriptedTests.scala:600)
[error] 	at sbt.scriptedtest.ScriptedRunner.run(ScriptedTests.scala:453)
[error] 	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
[error] 	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
[error] 	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
[error] 	at java.lang.reflect.Method.invoke(Method.java:498)
[error] 	at sbt.ScriptedRun$RunV2.invoke(ScriptedRun.scala:152)
[error] 	at sbt.ScriptedRun.run(ScriptedRun.scala:35)
[error] 	at sbt.ScriptedRun.run$(ScriptedRun.scala:16)
[error] 	at sbt.ScriptedRun$RunV2.run(ScriptedRun.scala:133)
[error] 	at sbt.ScriptedPlugin$.$anonfun$scriptedTask$3(ScriptedPlugin.scala:189)
[error] 	at sbt.ScriptedPlugin$.$anonfun$scriptedTask$3$adapted(ScriptedPlugin.scala:1[78](https://github.com/sbt/sbt-mocha/actions/runs/7703064060/job/20992712116?pr=33#step:10:79))
[error] 	at scala.Function1.$anonfun$compose$1(Function1.scala:49)
[error] 	at sbt.internal.util.$tilde$greater.$anonfun$$u2219$1(TypeFunctions.scala:63)
[error] 	at sbt.std.Transform$$anon$4.work(Transform.scala:69)
[error] 	at sbt.Execute.$anonfun$submit$2(Execute.scala:283)
[error] 	at sbt.internal.util.ErrorHandling$.wideConvert(ErrorHandling.scala:24)
[error] 	at sbt.Execute.work(Execute.scala:292)
[error] 	at sbt.Execute.$anonfun$submit$1(Execute.scala:283)
[error] 	at sbt.ConcurrentRestrictions$$anon$4.$anonfun$submitValid$1(ConcurrentRestrictions.scala:265)
[error] 	at sbt.CompletionService$$anon$2.call(CompletionService.scala:65)
[error] 	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
[error] 	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
[error] 	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
[error] 	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
[error] 	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
[error] 	at java.lang.Thread.run(Thread.java:750)
[error] (scripted) Failed tests:
[error] 	sbt-mocha-plugin/test
[error] Total time: [81](https://github.com/sbt/sbt-mocha/actions/runs/7703064060/job/20992712116?pr=33#step:10:82) s (01:21), completed Jan 29, 2024 10:07:20 PM