Fix io-ts version

gcanti/io-ts#705 fixes an issue with io-ts and non-enumerable
properties, but that results in objects with invalid properties to get
removed during `decode`, but that breaks our validation tests.

Need to figure out what is the right behavior for us

Change-type: patch

package.json

@@ -92,7 +92,7 @@
     "fp-ts": "^2.16.5",
     "got": "14.4.1",
     "husky": "^9.1.7",
-    "io-ts": "^2.2.20",
+    "io-ts": "2.2.20",
     "io-ts-reporters": "^2.0.1",
     "json-mask": "^2.0.0",
     "JSONStream": "^1.3.5",