Parallel: Cleaner interface for reporter dispatching

This gets jasmine-npm out of having to deal with QueueRunner, GlobalErrors,
and ReportDispatcher directly.

src/core/ParallelReportDispatcher.js

@@ -0,0 +1,65 @@
+getJasmineRequireObj().ParallelReportDispatcher = function(j$) {
+  /*
+    A report dispatcher packaged for convenient use from outside jasmine-core.
+
+    This isn't part of the public interface, but it is used by
+    jasmine-npm. -core and -npm version in lockstep at the major and minor
+    levels but version independently at the patch level. Any changes that
+    would break -npm should be done in a major or minor release, never a
+    patch release, and accompanied by a change to -npm that's released in
+    the same version.
+   */
+  function ParallelReportDispatcher(onError, deps = {}) {
+    const ReportDispatcher = deps.ReportDispatcher || j$.ReportDispatcher;
+    const QueueRunner = deps.QueueRunner || j$.QueueRunner;
+    const globalErrors = deps.globalErrors || new j$.GlobalErrors();
+    const dispatcher = ReportDispatcher(
+      j$.reporterEvents,
+      function(queueRunnerOptions) {
+        queueRunnerOptions = {
+          ...queueRunnerOptions,
+          globalErrors,
+          timeout: { setTimeout, clearTimeout },
+          fail: function(error) {
+            // A callback-style async reporter called either done.fail()
+            // or done(anError).
+            if (!error) {
+              error = new Error('A reporter called done.fail()');
+            }
+
+            onError(error);
+          },
+          onException: function(error) {
+            // A reporter method threw an exception or returned a rejected
+            // promise, or there was an unhandled exception or unhandled promise
+            // rejection while an asynchronous reporter method was running.
+            onError(error);
+          }
+        };
+        new QueueRunner(queueRunnerOptions).execute();
+      },
+      function(error) {
+        // A reporter called done() more than once.
+        onError(error);
+      }
+    );
+
+    const self = {
+      addReporter: dispatcher.addReporter.bind(dispatcher),
+      clearReporters: dispatcher.clearReporters.bind(dispatcher),
+      installGlobalErrors: globalErrors.install.bind(globalErrors),
+      uninstallGlobalErrors: function() {
+        // late-bind uninstall because it doesn't exist until install is called
+        globalErrors.uninstall(globalErrors);
+      }
+    };
+
+    for (const eventName of j$.reporterEvents) {
+      self[eventName] = dispatcher[eventName].bind(dispatcher);
+    }
+
+    return self;
+  }
+
+  return ParallelReportDispatcher;
+};