Bump slf4j-log4j12 from 1.7.36 to 2.0.6

Bumps [slf4j-log4j12](https://github.com/qos-ch/slf4j) from 1.7.36 to 2.0.6.
- [Release notes](https://github.com/qos-ch/slf4j/releases)
- [Commits](qos-ch/slf4j@v_1.7.36...v_2.0.6)

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

Signed-off-by: dependabot[bot] <[email protected]>

hmac-auth-proxy/build.gradle

@@ -17,7 +17,7 @@ dependencies {
     compile 'javax.activation:activation:1.1.1'
     compile 'com.beust:jcommander:1.82'
 
-    runtime 'org.slf4j:slf4j-log4j12:1.7.36'
+    runtime 'org.slf4j:slf4j-log4j12:2.0.6'
 
     testCompile 'org.testng:testng:7.5'
     testCompile 'org.hamcrest:hamcrest-library:2.2'