Update dependency com.google.code.gson:gson to v2.12.1 (square#4296)

* Update dependency com.google.code.gson:gson to v2.12.1

* Suppress EP check on intentionally-broken example

---------

Co-authored-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com>
Co-authored-by: Jake Wharton <[email protected]>

Author: renovate[bot]

gradle/libs.versions.toml

@@ -68,7 +68,7 @@ rxjava2 = { module = "io.reactivex.rxjava2:rxjava", version = "2.2.21" }
 rxjava3 = { module = "io.reactivex.rxjava3:rxjava", version = "3.1.10" }
 reactiveStreams = { module = "org.reactivestreams:reactive-streams", version = "1.0.4" }
 scalaLibrary = { module = "org.scala-lang:scala-library", version = "2.13.16" }
-gson = { module = "com.google.code.gson:gson", version = "2.11.0" }
+gson = { module = "com.google.code.gson:gson", version = "2.12.1" }
 jacksonDatabind = { module = "com.fasterxml.jackson.core:jackson-databind", version.ref = "jackson" }
 jacksonDataformatCbor = { module = "com.fasterxml.jackson.dataformat:jackson-dataformat-cbor", version.ref = "jackson" }
 jaxbApi = { module = "javax.xml.bind:jaxb-api", version = "2.3.1" }

retrofit-converters/gson/src/test/java/retrofit2/converter/gson/GsonConverterFactoryTest.java

@@ -66,6 +66,7 @@ public void write(JsonWriter out, Value value) {
           }
 
           @Override
+          @SuppressWarnings("CheckReturnValue")
           public Value read(JsonReader reader) throws IOException {
             reader.beginObject();
             reader.nextName();