[INTERNAL] licensee: Add exception for new deps

All three packages are licensed under the MIT license, but the
package.json file is missing the license field.

PRs to add the license field have already been opened for all three
packages.

.licensee.json

@@ -8,6 +8,9 @@
 		"blueOak": "bronze"
 	},
 	"packages": {
+		"atomically": "2.0.3",
+		"stubborn-fs": "1.2.5",
+		"when-exit": "2.1.3",
 		"callsite": "1.0.0",
 		"yesno": "0.4.0"
 	},