Bump testcontainers-java to 1.21.3

Author: mrotteveel

CHANGES.md

@@ -12,7 +12,7 @@ vNext
   Switch to the _project_ image  (`firebirdsql/firebird`).
 - Support for the _fdcastel_ image was removed as it is no longer available. \
   Switch to the _project_ image (`firebirdsql/firebird`).
-- Updated org.testcontainers:jdbc to 1.21.0
+- Updated org.testcontainers:jdbc to 1.21.3
 - Updated various test-dependencies
 - Updated Maven build plugins
 

pom.xml

@@ -37,7 +37,7 @@
         <maven.compiler.source>1.8</maven.compiler.source>
         <maven.compiler.target>1.8</maven.compiler.target>
 
-        <testcontainers.version>1.21.0</testcontainers.version>
+        <testcontainers.version>1.21.3</testcontainers.version>
         <jaybird.version>5.0.7.java8</jaybird.version>
         <junit5.version>5.12.2</junit5.version>
     </properties>