fix: correct internal module paths to be SystemJS compatible

.travis.yml

@@ -32,6 +32,7 @@ install:
 script:
   - if [ "$FULL_VALIDATE" == "true" ] && [ -n "DANGER_GITHUB_API_TOKEN" ]; then echo {} > ./.babelrc && npx danger; fi
   - npm test
+  - npm run test:systemjs
 
 after_success:
   - if [ "$FULL_VALIDATE" == "true" ]; then npm run test:cover && npx nyc report --reporter=text-lcov | npx coveralls; fi

integration/systemjs/systemjs-compatibility-spec.js

@@ -0,0 +1,21 @@
+var System = require('systemjs');
+var path = require('path');
+
+System.config({
+  map: { 'rxjs': path.join(__dirname, '..', '..', 'dist', 'cjs', '/') },
+  packages: { 'rxjs': {main: 'index.js', defaultExtension: 'js' }}
+});
+
+Promise.all([
+  System.import('rxjs'),
+  System.import('rxjs/ajax'),
+  System.import('rxjs/operators'),
+  System.import('rxjs/testing'),
+  System.import('rxjs/websocket'),
+]).then(
+  function () { console.log('Successfully tested all entry-points with SystemJS!'); },
+  function () {
+    console.error('\n\nFailed to load an entry-points via SystemJS: \n\n', error.message);
+    process.exit(-1);
+  }
+);

integration/systemjs/tsconfig.json

@@ -0,0 +1,12 @@
+{
+    "compilerOptions": {
+        "module": "commonjs",
+        "moduleResolution": "classic",
+        "target": "es2015",
+        "outDir": "../../dist/integration/",
+        "rootDir": "."
+    },
+    "exclude": [
+        "node_modules"
+    ]
+}

package.json

@@ -115,6 +115,7 @@
     "test": "cross-env TS_NODE_FAST=true mocha --compilers ts:ts-node/register --opts spec/support/coverage.opts \"spec/**/*-spec.ts\"",
     "test:cover": "cross-env TS_NODE_FAST=true nyc npm test",
     "test:circular": "dependency-cruise --validate .dependency-cruiser.json -x \"^node_modules\" src",
+    "test:systemjs": "node integration/systemjs/systemjs-compatibility-spec.js",
     "tests2png": "mkdirp tmp/docs/img && cross-env TS_NODE_FAST=true mocha --compilers ts:ts-node/register --opts spec/support/tests2png.opts \"spec/**/*-spec.ts\"",
     "watch": "watch \"echo triggering build && npm run test && echo build completed\" src -d -u -w=15"
   },
@@ -223,6 +224,7 @@
     "sinon-chai": "2.14.0",
     "source-map-support": "0.5.3",
     "symbol-observable": "1.0.1",
+    "systemjs": "^0.21.0",
     "ts-node": "4.1.0",
     "tslib": "1.5.0",
     "tslint": "5.9.1",

src/internal/observable/dom/AjaxObservable.ts

@@ -1,6 +1,6 @@
-import { root } from '../..//util/root';
-import { tryCatch } from '../..//util/tryCatch';
-import { errorObject } from '../..//util/errorObject';
+import { root } from '../../util/root';
+import { tryCatch } from '../../util/tryCatch';
+import { errorObject } from '../../util/errorObject';
 import { Observable } from '../../Observable';
 import { Subscriber } from '../../Subscriber';
 import { TeardownLogic } from '../../types';

src/internal/observable/dom/WebSocketSubject.ts

@@ -5,8 +5,8 @@ import { Subscription } from '../../Subscription';
 import { Operator } from '../../Operator';
 import { ReplaySubject } from '../../ReplaySubject';
 import { Observer, NextObserver } from '../../types';
-import { tryCatch } from '../..//util/tryCatch';
-import { errorObject } from '../..//util/errorObject';
+import { tryCatch } from '../../util/tryCatch';
+import { errorObject } from '../../util/errorObject';
 
 export interface WebSocketSubjectConfig {
   url: string;

src/internal/operators/first.ts

@@ -1,7 +1,7 @@
 import { Observable } from '../Observable';
 import { Operator } from '../Operator';
 import { Subscriber } from '../Subscriber';
-import { EmptyError } from '..//util/EmptyError';
+import { EmptyError } from '../util/EmptyError';
 import { MonoTypeOperatorFunction } from '../../internal/types';
 
 /**

src/internal/operators/last.ts

@@ -1,7 +1,7 @@
 import { Observable } from '../Observable';
 import { Operator } from '../Operator';
 import { Subscriber } from '../Subscriber';
-import { EmptyError } from '..//util/EmptyError';
+import { EmptyError } from '../util/EmptyError';
 import { MonoTypeOperatorFunction } from '../../internal/types';
 
 /**

src/internal/patching/operator/bufferTime.ts

@@ -1,7 +1,7 @@
 import { SchedulerLike } from '../../types';
 import { async } from '../../scheduler/async';
 import { Observable } from '../../Observable';
-import { isScheduler } from '../..//util/isScheduler';
+import { isScheduler } from '../../util/isScheduler';
 import { bufferTime as higherOrder } from '../../operators/bufferTime';
 
 /* tslint:disable:max-line-length */

src/internal/patching/operator/combineLatest.ts

@@ -2,7 +2,7 @@ import { Observable } from '../../Observable';
 import { ObservableInput } from '../../types';
 import { CombineLatestOperator } from '../../observable/combineLatest';
 import { of } from '../../observable/of';
-import { isArray } from '../..//util/isArray';
+import { isArray } from '../../util/isArray';
 
 /* tslint:disable:max-line-length */
 export function combineLatest<T, R>(this: Observable<T>, project: (v1: T) => R): Observable<R>;

src/internal/patching/operator/windowTime.ts

@@ -1,8 +1,8 @@
 import { SchedulerLike } from '../../types';
 import { async } from '../../scheduler/async';
 import { Observable } from '../../Observable';
-import { isNumeric } from '../..//util/isNumeric';
-import { isScheduler } from '../..//util/isScheduler';
+import { isNumeric } from '../../util/isNumeric';
+import { isScheduler } from '../../util/isScheduler';
 import { windowTime as higherOrder } from '../../operators/windowTime';
 
 /**