Make the gson dependency in yaml-tests explicit. (#3911)

Fixes #3862.

Author: MMcM

gradle/libs.versions.toml

@@ -36,6 +36,7 @@ geophile = "2.3.0"
 generatedAnnotation = "1.3.2"
 grpc = "1.64.1"
 grpc-commonProtos = "2.37.0"
+gson = "2.13.2"
 guava = "33.4.8-jre"
 h2 = "1.3.148"
 icu = "69.1"
@@ -94,6 +95,7 @@ grpc-protobuf = { module = "io.grpc:grpc-protobuf", version.ref = "grpc" }
 grpc-services = { module = "io.grpc:grpc-services", version.ref = "grpc" }
 grpc-stub = { module = "io.grpc:grpc-stub", version.ref = "grpc" }
 grpc-util = { module = "io.grpc:grpc-util", version.ref = "grpc" }
+gson = { module = "com.google.code.gson:gson", version.ref = "gson" }
 guava = { module = "com.google.guava:guava", version.ref = "guava" }
 icu = { module = "com.ibm.icu:icu4j", version.ref = "icu" }
 javaPoet = { module = "com.squareup:javapoet", version.ref = "javaPoet" }

yaml-tests/yaml-tests.gradle

@@ -55,6 +55,7 @@ dependencies {
     implementation(libs.junit.params)
     implementation(libs.junit.platform)
     implementation(libs.log4j.api)
+    implementation(libs.gson)
     implementation(libs.guava)
     implementation(libs.protobuf)
     implementation(libs.protobuf.util)