deps: update iam.version to v1.0.12 (#327)

Author: renovate-bot

java-shared-dependencies/pom.xml

@@ -69,7 +69,7 @@
     <threeten.version>1.5.0</threeten.version>
     <javax.annotations.version>1.3.2</javax.annotations.version>
     <animal-sniffer.version>1.20</animal-sniffer.version>
-    <iam.version>1.0.11</iam.version>
+    <iam.version>1.0.12</iam.version>
     <opencensus.version>0.28.0</opencensus.version>
     <findbugs.version>3.0.2</findbugs.version>
     <errorprone.version>2.6.0</errorprone.version>