added types for extrension api

package-lock.json

@@ -12552,6 +12552,12 @@
         }
       }
     },
+    "web-ext-types": {
+      "version": "3.2.1",
+      "resolved": "https://registry.npmjs.org/web-ext-types/-/web-ext-types-3.2.1.tgz",
+      "integrity": "sha512-oQZYDU3W8X867h8Jmt3129kRVKklz70db40Y6OzoTTuzOJpF/dB2KULJUf0txVPyUUXuyzV8GmT3nVvRHoG+Ew==",
+      "dev": true
+    },
     "webidl-conversions": {
       "version": "5.0.0",
       "resolved": "https://registry.npmjs.org/webidl-conversions/-/webidl-conversions-5.0.0.tgz",

package.json

@@ -31,6 +31,7 @@
 		"ts-loader": "^7.0.0",
 		"typescript": "^3.8.3",
 		"web-ext": "^4.2.0",
+		"web-ext-types": "^3.2.1",
 		"webpack": "^4.42.1",
 		"webpack-cli": "^3.3.11",
 		"webpack-dev-server": "^3.10.3"

tsconfig.json

@@ -6,6 +6,7 @@
 		"sourceMap": true,
 		"noLib": false,
 		"jsx": "react",
+		"typeRoots": ["node_modules/@types", "node_modules/web-ext-types"],
 	},
 	"exclude": [
 		"node_modules"