Redesigned moudule system

* Top level private APIs (e.g. jasmine.private.whatever) are no longer
  exposed
* jasmineRequire is no longer exposed
* core is self-booting
* Globals are automatically created in browsers. (They can subsequently
  be removed by user code if desired.)
* Globals are *not* automatically created in Node. An installGlobals
  function is exported instead. The jasmine package calls installGlobals
  unless configured not to do so.
* In Node, the same instance is returned each time jasmine-core is
  imported. A reset function is exported. It effectively resets all state
  by discarding the env and creating a new one. This allows mulitple
  sequential runs within the same process to be independent of each
  other, but does not allow multiple concurrent runs. (That probably never
  worked anyway.)

Fixes #2094

src/core/TreeRunner.js

@@ -1,4 +1,4 @@
-getJasmineRequireObj().TreeRunner = function(j$) {
+getJasmineRequireObj().TreeRunner = function(j$, private$) {
   'use strict';
 
   class TreeRunner {
@@ -83,14 +83,14 @@ getJasmineRequireObj().TreeRunner = function(j$) {
         },
         onComplete: () => {
           if (spec.status() === 'failed') {
-            specOverallDone(new j$.private.StopExecutionError('spec failed'));
+            specOverallDone(new private$.StopExecutionError('spec failed'));
           } else {
             specOverallDone();
           }
         },
         userContext: spec.userContext(),
         runnableName: spec.getFullName.bind(spec),
-        SkipPolicy: j$.private.CompleteOnFirstErrorSkipPolicy
+        SkipPolicy: private$.CompleteOnFirstErrorSkipPolicy
       });
     }
 
@@ -265,7 +265,7 @@ getJasmineRequireObj().TreeRunner = function(j$) {
 
     async #reportChildrenOfBeforeAllFailure(suite) {
       for (const child of suite.children) {
-        if (child instanceof j$.private.Suite) {
+        if (child instanceof private$.Suite) {
           await this.#reportDispatcher.suiteStarted(child.startedEvent());
           await this.#reportChildrenOfBeforeAllFailure(child);
           await this.#reportDispatcher.suiteDone(child.doneEvent());
@@ -280,9 +280,9 @@ getJasmineRequireObj().TreeRunner = function(j$) {
 
     #suiteSkipPolicy() {
       if (this.#getConfig().stopOnSpecFailure) {
-        return j$.private.CompleteOnFirstErrorSkipPolicy;
+        return private$.CompleteOnFirstErrorSkipPolicy;
       } else {
-        return j$.private.SkipAfterBeforeAllErrorPolicy;
+        return private$.SkipAfterBeforeAllErrorPolicy;
       }
     }
   }