Bump forbidden apis from 3.2 to 3.4
diff --git a/gradle.properties b/gradle.properties
index 749667d..1ee053f 100644
--- a/gradle.properties
+++ b/gradle.properties
@@ -39,7 +39,7 @@
 com.github.spotbugs.version=2.0.0
 com.github.vlsi.vlsi-release-plugins.version=1.84
 com.google.protobuf.version=0.8.12
-de.thetaphi.forbiddenapis.version=3.2
+de.thetaphi.forbiddenapis.version=3.4
 org.jetbrains.gradle.plugin.idea-ext.version=0.5
 org.nosphere.apache.rat.version=0.5.3
 org.owasp.dependencycheck.version=5.2.2