Add typescript to devDependencies

Signed-off-by: Xavier Geerinck <[email protected]>

Author: XavierGeerinck

package-lock.json

@@ -47,11 +47,12 @@
         "jest": "^27.2.0",
         "nodemon": "^2.0.12",
         "prettier": "^2.4.0",
-        "ts-jest": "^27.0.5"
+        "ts-jest": "^27.0.5",
+        "typescript": "^4.5.5"
     },
     "repository": {
         "type": "git",
         "url": "https://github.com/dapr/js-sdk.git",
         "directory": ""
     }
-}
+}