Bump knip from 1.6.1 to 2.15.1 (#516)

* Bump knip from 1.6.1 to 2.15.1

* Update licensee configuration

Add three exceptions to the Licensee configuration following the upgrade
to knip v2.15.1. This upgrade introduced these three dependencies with
invalid license metadata into the dependency tree. Each dependency has
been manually evaluated for inclusion:

- deep-freeze: terms described as "public domain" [^1].
- filter-iterator: MIT license, see "License" section of the readme.
- identity-function: terms described as "public domain" [^1].

* Update knip configuration

Remove unnecessary ignore for the `eslint-v8` dependency.

--
^1: As "public domain" isn't a valid SPDX license it's not accepted by
licensee.

.licensee.json

@@ -16,6 +16,10 @@
       "Zlib"
     ]
   },
-  "packages": {},
+  "packages": {
+    "deep-freeze": "0.0.1",
+    "filter-iterator": "0.0.1",
+    "identity-function": "1.0.0"
+  },
   "corrections": true
 }

knip.json

@@ -3,5 +3,5 @@
   "entry": ["lib/index.ts!"],
   "project": ["lib/**/*.ts!"],
   "ignoreBinaries": ["actionlint"],
-  "ignoreDependencies": ["@ericcornelissen/eslint-plugin-top", "eslint-v8"]
+  "ignoreDependencies": ["@ericcornelissen/eslint-plugin-top"]
 }