Chore(deps): Bump org.slf4j:slf4j-bom from 2.0.18 to 2.0.20 - #2325

Sourced from org.slf4j:slf4j-bom's releases.

SLF4J 2.0.20

2026-09-22 - Release of SLF4J 2.0.20

• Marker instances are slated to become immutable in future releases. As such, methods in the Marker interface adding/removing children are now marked as deprecated.

• A bit-wise identical binary of this version can be reproduced by building from source code at commit 58d80a4fe8f2e811707fcfba4d292b5d62fc2fe9 associated with the tag v_2.0.20. Release built using Java "21" 2023-10-17 LTS build 21.0.1.+12-LTS-29 under Linux Debian 11.6.

Full Changelog: qos-ch/slf4j@v_2.0.19...v_2.0.20

SLF4J 2.0.19

2026-09-04 - Release of SLF4J 2.0.19

• When the fluent API was used with XLogger/LoggerWrapper in the slf4j-ext module, caller location was incorrectly reported. To correct this, LoggerWrapper now delegates makeLoggingEventBuilder() to the wrapped logger so that the application caller can be correctly extracted. This issue was reported in issues/464.

• In slf4j-api/DefaultLoggingEventBuilder, a failing toString() invocation on a key-value value, including StackOverflowError, no longer aborts logging. The builder now substitutes [FAILED toString()], matching the existing behaviour of MessageFormatter for message arguments. This issue was reported in issues/448.

• The isLoggable() method in SLF4JPlatformLogger now maps System.Logger.Level.ALL and Level.OFF the same way as log(), that is ALL as TRACE and OFF as ERROR, instead of treating both as always loggable. This is a follow-up to the changes introduced in 2.0.17. See issues/430.

• Published JAR files now package each module's own LICENSE.txt under META-INF/. Previously the parent POM copied the repository-root MIT license into every module, so Apache-2.0 modules such as jcl-over-slf4j and log4j-over-slf4j shipped the wrong license text. This issue was reported in issues/465.

• A bit-wise identical binary of this version can be reproduced by building from source code at commit f0fc3e52a16d5053039495f4f3b64d191508204f associated with the tag v_2.0.19. Release built using Java "21" 2023-10-17 LTS build 21.0.1.+12-LTS-29 under Linux Debian 11.6.

• 58d80a4 prepare release 2.0.20
• ef47ab9 deprecate methods for adding/remocing children to markers
• 6b6c63e fix failing test on Windows
• 233d4d1 renamed LoggerTestSuite.java as SimpleLoggerAcceptanceTest
• bf3a7b9 start work on 2.0.20-SNAPSHOT
• f0fc3e5 prepare release 2.0.19
• 2288d0c fix issues/464. slf4j-ext/XLogger incorrect caller extraction when the fluent...
• 6ff7f77 test: pin fluent API caller method name
• 2b3f94b SLF4JPlatformLogger.isLoggable should handle Logger.ALL and Logger.OFF in a c...
• 9221f77 fix(api): guard addKeyValue value toString from fatal errors
• Additional commits viewable in compare view

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