Add logic for processing DOTNET_INSTALL_DIR environment variable (#332)

package.json

@@ -1,6 +1,6 @@
 {
   "name": "setup-dotnet",
-  "version": "3.0.1",
+  "version": "3.0.2",
   "private": true,
   "description": "setup dotnet action",
   "main": "lib/setup-dotnet.js",
@@ -41,9 +41,9 @@
     "husky": "^8.0.1",
     "jest": "^27.2.5",
     "jest-circus": "^27.2.5",
-    "prettier": "^1.19.1",
+    "prettier": "^2.7.1",
     "ts-jest": "^27.0.5",
-    "typescript": "^3.9.7",
+    "typescript": "^4.8.4",
     "wget-improved": "^3.2.1"
   },
   "jest": {