Add web front-end and fix API issues

node_modules/rxjs/dist/esm/internal/observable/merge.js

@@ -0,0 +1,19 @@
+import { mergeAll } from '../operators/mergeAll';
+import { innerFrom } from './innerFrom';
+import { EMPTY } from './empty';
+import { popNumber, popScheduler } from '../util/args';
+import { from } from './from';
+export function merge(...args) {
+    const scheduler = popScheduler(args);
+    const concurrent = popNumber(args, Infinity);
+    const sources = args;
+    return !sources.length
+        ?
+            EMPTY
+        : sources.length === 1
+            ?
+                innerFrom(sources[0])
+            :
+                mergeAll(concurrent)(from(sources, scheduler));
+}
+//# sourceMappingURL=merge.js.map