Bump org.slf4j:slf4j-log4j12 from 2.0.18 to 2.0.19

Bumps org.slf4j:slf4j-log4j12 from 2.0.18 to 2.0.19.

---
updated-dependencies:
- dependency-name: org.slf4j:slf4j-log4j12
  dependency-version: 2.0.19
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

Signed-off-by: dependabot[bot] <support@github.com>

Author: dependabot[bot]

assertlog-log4j-junit4/build.gradle

@@ -3,6 +3,6 @@ dependencies {
   implementation('org.opentest4j:opentest4j:1.3.0')
   implementation('junit:junit:4.13.2')
   implementation('log4j:log4j:1.2.17')
-  testImplementation('org.slf4j:slf4j-log4j12:2.0.18')
-  testImplementation('org.slf4j:jul-to-slf4j:2.0.18')
+  testImplementation('org.slf4j:slf4j-log4j12:2.0.19')
+  testImplementation('org.slf4j:jul-to-slf4j:2.0.19')
 }