fix classpath of checkerFramework

Author: wadoon

key.util/build.gradle

@@ -7,12 +7,24 @@ description = "Utility library of the key-project"
 dependencies {
     implementation("org.jspecify:jspecify:1.0.0")
 
+    // we also export these dependency into src/test/java.
+    testFixturesApi(project(':key.util'))
+
     testFixturesApi(platform("org.junit:junit-bom:5.14.2"))
     testFixturesApi("org.junit.jupiter:junit-jupiter-api")
     testFixturesApi("org.junit.jupiter:junit-jupiter-params")
     testFixturesApi("org.assertj:assertj-core:3.27.7")
     testFixturesApi("ch.qos.logback:logback-classic:1.5.27")
     testFixturesApi("org.jspecify:jspecify:1.0.0")
+
+    testFixturesApi("ch.qos.logback:logback-classic:1.5.27")
+
+    // test fixtures
+    testFixturesApi("com.fasterxml.jackson.dataformat:jackson-dataformat-yaml:2.21.0")
+    testFixturesApi("com.fasterxml.jackson.datatype:jackson-datatype-jsr310:2.21.0")
+
+    def eisop_version = "3.49.3-eisop1"
+    testFixturesCompileOnly( "io.github.eisop:checker-qual:$eisop_version")
 }
 
 checkerFramework {