[TASK] Add TypeScript type definitions to linter

Resolves: #81480
Releases: Master
Change-Id: I6dddb5504ba9ecd22952c371610c225e700b6100
Reviewed-on: https://review.typo3.org/53137


Tested-by: TYPO3com <no-reply@typo3.com>
Reviewed-by: Georg Ringer <georg.ringer@gmail.com>
Reviewed-by: Christian Kuhn <lolli@schwarzbu.ch>
Tested-by: Christian Kuhn <lolli@schwarzbu.ch>

Build/Gruntfile.js

@@ -202,7 +202,8 @@ module.exports = function (grunt) {
 			},
 			files: {
 				src: [
-					'<%= paths.sysext %>*/Resources/Private/TypeScript/**/*.ts'
+					'<%= paths.sysext %>*/Resources/Private/TypeScript/**/*.ts',
+					'./types/**/*.ts'
 				]
 			}
 		},