Prepare for 3.0.3 release (#273)

* Downgrade logback from 1.5.16 to 1.3.15 to maintain JDK 8 compatibility

Author: ethkatnic

Diff for: README.md

@@ -145,7 +145,11 @@ all languages.
 * The [Amazon Kinesis Forum][kinesis-forum]
 
 ## Release Notes
+### Release 3.0.3 (March 25, 2025)
+* Downgrade logback from 1.5.16 to 1.3.15 to maintain JDK 8 compatability
+
 ### Release 3.0.2 (March 24, 2025)
+#### :warning: [BREAKING CHANGES] - Release 3.0.2 contains a dependency version that is not compatible with JDK 8. Please upgrade to a later version if your KCL application requires JDK 8.
 * [KCL 3.0.2 Changelog](https://github.com/awslabs/amazon-kinesis-client/blob/5263b4227ce7210d52bec6817191d43f047cd1b2/CHANGELOG.md) Upgrade KCL and KCL-Multilang dependencies from 3.0.0 to 3.0.2
 * [#266](https://github.com/awslabs/amazon-kinesis-client-python/pull/266) Upgrade netty.version from 4.1.108.Final to 4.1.118.Final
 * [#265](https://github.com/awslabs/amazon-kinesis-client-python/pull/265) Upgrade logback.version from 1.3.14 to 1.5.16

Diff for: pom.xml

@@ -7,7 +7,7 @@
         <netty.version>4.1.118.Final</netty.version>
         <netty-reactive.version>2.0.6</netty-reactive.version>
         <fasterxml-jackson.version>2.13.5</fasterxml-jackson.version>
-        <logback.version>1.5.16</logback.version>
+        <logback.version>1.3.15</logback.version>
     </properties>
     <dependencies>
         <dependency>

Diff for: setup.py

@@ -42,7 +42,7 @@
 
 PACKAGE_NAME = 'amazon_kclpy'
 JAR_DIRECTORY = os.path.join(PACKAGE_NAME, 'jars')
-PACKAGE_VERSION = '3.0.2'
+PACKAGE_VERSION = '3.0.3'
 PYTHON_REQUIREMENTS = [
     'boto3',
     # argparse is part of python2.7 but must be declared for python2.6