fix build errors

samples/react-calendar-feed/package.json

@@ -3,7 +3,6 @@
   "version": "5.3.0",
   "private": true,
   "main": "lib/index.js",
-
   "scripts": {
     "build": "gulp bundle",
     "clean": "gulp clean",
@@ -21,7 +20,6 @@
     "@pnp/sp": "^1.2.8",
     "@pnp/spfx-controls-react": "^1.11.0",
     "@pnp/spfx-property-controls": "^1.13.1",
-
     "feedparser": "^2.2.9",
     "ical.js": "^1.3.0",
     "ics-js": "^0.10.2",
@@ -40,17 +38,18 @@
   "devDependencies": {
     "@babel/core": "^7.10.4",
     "@babel/preset-env": "^7.10.4",
-    "@microsoft/rush-stack-compiler-4.5": "0.2.2",
+    "@microsoft/eslint-config-spfx": "1.15.0",
+    "@microsoft/eslint-plugin-spfx": "1.15.0",
     "@microsoft/rush-stack-compiler-3.3": "0.3.5",
+    "@microsoft/rush-stack-compiler-4.5": "0.2.2",
     "@microsoft/sp-build-web": "1.15.2",
     "@microsoft/sp-module-interfaces": "1.15.0",
     "@rushstack/eslint-config": "2.5.1",
-    "@microsoft/eslint-plugin-spfx":"1.15.0",
-    "@microsoft/eslint-config-spfx":"1.15.0",
-    "eslint-plugin-react-hooks":"4.3.0",
-    "eslint":"8.7.0",
+    "@types/node": "18.11.3",
     "ajv": "6.12.5",
     "babel-loader": "^8.1.0",
+    "eslint": "8.7.0",
+    "eslint-plugin-react-hooks": "4.3.0",
     "gulp": "4.0.2",
     "webpack": "^4.43.0"
   }

samples/react-calendar-feed/src/shared/services/CalendarService/CalendarServiceProviderList.ts

@@ -5,6 +5,8 @@ import { iCalCalendarService } from "./iCalCalendarService";
 import { ExchangePublicCalendarService } from "./ExchangePublicCalendarService";
 import { SharePointCalendarService } from "./SharePointCalendarService";
 
+const DEBUG:boolean = false;
+
 // Localization
 import * as strings from "CalendarServicesStrings";
 

samples/react-calendar-feed/tsconfig.json

@@ -19,7 +19,7 @@
       "./node_modules/@microsoft"
     ],
     "types": [
-      "webpack-env"
+      "node"
     ],
     "lib": [
       "es5",