Bump com.graphql-java:graphql-java from 20.2 to 20.3

Bumps [com.graphql-java:graphql-java](https://github.com/graphql-java/graphql-java) from 20.2 to 20.3.
- [Release notes](https://github.com/graphql-java/graphql-java/releases)
- [Commits](graphql-java/graphql-java@v20.2...v20.3)

---
updated-dependencies:
- dependency-name: com.graphql-java:graphql-java
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <[email protected]>

build.gradle

@@ -45,7 +45,7 @@ repositories {
 }
 
 dependencies {
-    compile "com.graphql-java:graphql-java:20.2"
+    compile "com.graphql-java:graphql-java:20.3"
 
     testImplementation 'org.spockframework:spock-core:1.3-groovy-2.5'
     testImplementation('org.codehaus.groovy:groovy:2.5.13')