Merge pull request #388 from 4Catalyzer/sliu/fix_noshadow_error

fix: eslint "no-shadow" error

package.json

@@ -1,6 +1,6 @@
 {
   "name": "@4c/graphql-subscription-server",
-  "version": "1.1.0",
+  "version": "1.1.1",
   "author": "4Catalyzer",
   "license": "MIT",
   "main": "lib/index.js",
@@ -58,22 +58,22 @@
   },
   "devDependencies": {
     "@4c/babel-preset": "^8.0.1",
-    "@4c/cli": "^2.1.11",
+    "@4c/cli": "^2.1.12",
     "@4c/jest-preset": "^1.5.3",
     "@4c/prettier-config": "^1.1.0",
     "@4c/semantic-release-config": "^2.0.13",
     "@4c/tsconfig": "^0.3.1",
     "@babel/cli": "^7.12.1",
     "@babel/core": "^7.12.3",
     "@babel/preset-typescript": "^7.12.1",
-    "@typescript-eslint/eslint-plugin": "^3.10.1",
-    "@typescript-eslint/parser": "^3.10.1",
+    "@typescript-eslint/eslint-plugin": "^4.6.1",
+    "@typescript-eslint/parser": "^4.6.1",
     "babel-jest": "^26.5.2",
     "codecov": "^3.8.0",
     "eslint-config-4catalyzer": "^1.1.4",
     "eslint-config-4catalyzer-jest": "^2.0.9",
     "eslint-config-4catalyzer-typescript": "^3.0.1",
-    "eslint-config-prettier": "^6.13.0",
+    "eslint-config-prettier": "^6.15.0",
     "eslint-plugin-import": "^2.22.1",
     "eslint-plugin-jest": "^24.1.0",
     "eslint-plugin-jsx-a11y": "^6.3.1",
@@ -86,11 +86,11 @@
     "redis-mock": "^0.52.0",
     "semantic-release": "^17.2.1",
     "travis-deploy-once": "^5.0.11",
-    "typescript": "^4.0.3",
+    "typescript": "^4.0.5",
     "utility-types": "^3.10.0"
   },
   "engines": {
-    "node": ">=v10.19.0"
+    "node": ">=v12"
   },
   "bugs": {
     "url": "https://github.com/4Catalyzer/graphql-subscription-server/issues"

src/EventSubscriber.ts

@@ -1,4 +1,4 @@
-import * as EventEmitter from 'events';
+import { EventEmitter } from 'events';
 
 import { AsyncQueue } from './AsyncUtils';
 import { Subscriber } from './Subscriber';