[fix] Symbol.observable

[optimize] upgrade Upstream packages

Author: TechQuery

.gitignore

@@ -3,3 +3,4 @@ package-lock.json
 dist/
 .cache/
 docs/
+.vscode/

.npmignore

@@ -1,4 +1,5 @@
 .editorconfig
+.vscode/
 test/
 .cache/
 docs/

ReadMe.md

@@ -2,10 +2,11 @@
 
 [Observable Proposal][1] implement based on [Async Generator (ES 2018)][2] & [TypeScript][3]
 
-[![Build Status](https://travis-ci.com/EasyWebApp/iterable-observer.svg?branch=master)][4]
-[![](https://data.jsdelivr.com/v1/package/npm/iterable-observer/badge?style=rounded)][5]
+[![NPM Dependency](https://david-dm.org/EasyWebApp/iterable-observer.svg)][4]
+[![Build Status](https://travis-ci.com/EasyWebApp/iterable-observer.svg?branch=master)][5]
+[![](https://data.jsdelivr.com/v1/package/npm/iterable-observer/badge?style=rounded)][6]
 
-[![NPM](https://nodei.co/npm/iterable-observer.png?downloads=true&downloadRank=true&stars=true)][6]
+[![NPM](https://nodei.co/npm/iterable-observer.png?downloads=true&downloadRank=true&stars=true)][7]
 
 ## Usage
 
@@ -77,6 +78,7 @@ app.use(BodyParser)
 [1]: https://github.com/tc39/proposal-observable
 [2]: https://tc39.es/ecma262/#sec-asyncgeneratorfunction-objects
 [3]: https://www.typescriptlang.org/
-[4]: https://travis-ci.com/EasyWebApp/iterable-observer
-[5]: https://www.jsdelivr.com/package/npm/iterable-observer
-[6]: https://nodei.co/npm/iterable-observer/
+[4]: https://david-dm.org/EasyWebApp/iterable-observer
+[5]: https://travis-ci.com/EasyWebApp/iterable-observer
+[6]: https://www.jsdelivr.com/package/npm/iterable-observer
+[7]: https://nodei.co/npm/iterable-observer/

package.json

@@ -1,6 +1,6 @@
 {
     "name": "iterable-observer",
-    "version": "1.0.0-beta.3",
+    "version": "1.0.0-beta.5",
     "license": "LGPL-3.0",
     "author": "[email protected]",
     "description": "Observable Proposal implement based on Async Generator (ES 2018) & TypeScript",
@@ -25,17 +25,16 @@
     "types": "dist/index.d.ts",
     "main": "dist/index.js",
     "devDependencies": {
-        "@types/jest": "^25.2.1",
-        "@types/node": "^13.11.1",
+        "@types/jest": "^26.0.4",
         "husky": "^4.2.5",
-        "jest": "^25.3.0",
-        "lint-staged": "^10.1.3",
+        "jest": "^26.1.0",
+        "lint-staged": "^10.2.11",
         "open-cli": "^6.0.1",
         "parcel-bundler": "^1.12.4",
-        "prettier": "^2.0.4",
-        "ts-jest": "^25.3.1",
-        "typedoc": "^0.17.4",
-        "typescript": "^3.8.3"
+        "prettier": "^2.0.5",
+        "ts-jest": "^26.1.2",
+        "typedoc": "^0.17.8",
+        "typescript": "^3.9.6"
     },
     "prettier": {
         "singleQuote": true,

source/Observable.ts

@@ -1,6 +1,12 @@
 import { Defer, makeDefer, EventTrigger } from './utility';
 
-Symbol.observable = Symbol('observable');
+declare global {
+    interface SymbolConstructor {
+        observable: symbol;
+    }
+}
+
+if (!Symbol.observable) Symbol.observable = Symbol('observable');
 
 export interface Observer<T = any> {
     next(value: T): void;